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2026 Volume 17
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ARTICLE   Open Access    

Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa

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  • Received: 08 December 2025
    Revised: 07 May 2026
    Accepted: 20 May 2026
    Published online: 24 July 2026
    Mycosphere  17 Article number: e011 (2026)  |  Cite this article
  • Amphisphaeriales primarily contains saprobes, pathogens, and endophytes. This order of fungi is difficult to identify because of its taxonomic and morphological complexities. However, it has significant ecological and economic value and has recently become a major focus in fungal research. A total of 164 strains, isolated from decaying plant materials, diseased leaves, and healthy leaves, were used to explore the taxonomic diversity of Amphisphaeriales in China based on analyses of its morphology and multi-locus phylogenies (internal transcribed spacer [ITS], large subunit of ribosomal DNA [LSU], translation elongation factor 1-alpha [tef-1α], and beta tubulin [tub2]). The results of these analyses showed that all these collected strains belonged to 71 species, including Apiosporaceae (Apiospora and Nigrospora), Beltraniaceae (Beltraniella), and Sporocadaceae (Neopestalotiopsis, Pestalotiopsis, and Pseudopestalotiopsis). These analyses reveal three major findings: 38 new species, 33 known species (with A. locuta-pollinis (syn. A. fuxianhuensis) included among the known species. Through this study, we confirm a primary association of Apiospora with Poaceae in tropical and subtropical climates and documents multi-species co-infections. Our findings significantly contribute to the understanding of the placement of new taxa in Apiosporaceae, Beltraniaceae, and Sporocadaceae. Moreover, the results of this study contribute to the future taxonomic revisions and systematic studies of Amphisphaeriales. Keywords: Amphisphaeriales, new species, Apiosporaceae, Beltraniaceae, Sporocadaceae, Phylogeny, Taxonomy
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  • Supplementary Information 1 Details of known species.
    Supplementary Information 2 Names, strains and corresponding GenBank accession numbers of all the taxa are listed in this study.
    Supplementary Information 3 GenBank accession numbers used for the Apiospora phylogenetic reconstruction.
    Supplementary Information 4 GenBank accession numbers used for the Nigrospora phylogenetic reconstruction.
    Supplementary Information 5 GenBank accession numbers used for the Beltraniella phylogenetic reconstruction.
    Supplementary Information 6 GenBank accession numbers used for the Neopestalotiopsis phylogenetic reconstruction.
    Supplementary Information 7 GenBank accession numbers used for the Pestalotiopsis phylogenetic reconstruction.
    Supplementary Information 8 GenBank accession numbers used for the Pseudopestalotiopsis phylogenetic reconstruction.
    Supplementary Information 9 Dichotomous key for Amphisphaeriales.
    Supplementary Information 10 Single-locus phylograms of the genus Apiospora based on alignments of the ITS, LSU, tef1-α, and tub2 regions, respectively.
    Supplementary Information 11 Asexual morphological characters in selected Apiospora species.
    Supplementary Information 12 Phylogram of the genus Neopestalotiopsis based on a concatenated ITS, tef1-α, and tub2 sequence alignment, with Pestalotiopsis colombiensis and P. diversiseta serving as outgroups.
    Supplementary Information 13 Single-locus phylograms of the genus Pestalotiopsis based on alignments of the ITS, tef1-α, and tub2 regions, respectively.
    Supplementary Information 14    The phi test for Pestalotiopsis yuxiensis (p = 0.5).
    Supplementary Information 15 Apiospora isolates obtained from hosts in China.
    Supplementary Information 16 Record of microbial co-infection from individual plant leaves.
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  • Cite this article

    Liu QY, Zhang ZX, Wang YL, Zhang MY, Dong ZX, et al. 2026. Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa. Mycosphere 17: e011 doi: 10.48130/mycosphere-0026-0010
    Liu QY, Zhang ZX, Wang YL, Zhang MY, Dong ZX, et al. 2026. Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa. Mycosphere 17: e011 doi: 10.48130/mycosphere-0026-0010

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Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa

Mycosphere  17 Article number: e011  (2026)  |  Cite this article

Abstract: Amphisphaeriales primarily contains saprobes, pathogens, and endophytes. This order of fungi is difficult to identify because of its taxonomic and morphological complexities. However, it has significant ecological and economic value and has recently become a major focus in fungal research. A total of 164 strains, isolated from decaying plant materials, diseased leaves, and healthy leaves, were used to explore the taxonomic diversity of Amphisphaeriales in China based on analyses of its morphology and multi-locus phylogenies (internal transcribed spacer [ITS], large subunit of ribosomal DNA [LSU], translation elongation factor 1-alpha [tef-1α], and beta tubulin [tub2]). The results of these analyses showed that all these collected strains belonged to 71 species, including Apiosporaceae (Apiospora and Nigrospora), Beltraniaceae (Beltraniella), and Sporocadaceae (Neopestalotiopsis, Pestalotiopsis, and Pseudopestalotiopsis). These analyses reveal three major findings: 38 new species, 33 known species (with A. locuta-pollinis (syn. A. fuxianhuensis) included among the known species. Through this study, we confirm a primary association of Apiospora with Poaceae in tropical and subtropical climates and documents multi-species co-infections. Our findings significantly contribute to the understanding of the placement of new taxa in Apiosporaceae, Beltraniaceae, and Sporocadaceae. Moreover, the results of this study contribute to the future taxonomic revisions and systematic studies of Amphisphaeriales. Keywords: Amphisphaeriales, new species, Apiosporaceae, Beltraniaceae, Sporocadaceae, Phylogeny, Taxonomy

    • The order Amphisphaeriales was introduced by Eriksson and Hawksworth in 1986 and was taxonomically classified within the subclass Xylariomycetidae, class Sordariomycetes, and subphylum Pezizomycotina[1]. Amphisphaeriales and Xylariales had historically been treated as closely related orders or even synonyms[2,3], and were later formally considered synonymous[4,5]. Amphisphaeriales was resurrected based on morphological and phylogenetic data[6]. Previous studies have provided key evidence supporting the recognition of Amphisphaeriales and Xylariales as distinct orders, with divergence time serving as a critical criterion[711]. The sexual morph of Amphisphaeriales is defined as follows: ascomata are predominantly solitary, globose to subglobose, coriaceous, and erumpent, occurring with or without stromatic tissues; asci are cylindrical or clavate with a J+ or J− apical ring; ascospores are ellipsoid, apiosporous, fusiform, or oval in shape, unicellular to trans-septate, variously colored, and possess either smooth or ornamented walls with or without appendages or mucilaginous sheaths[6,11,12]. The asexual morph of Amphisphaeriales is characterized by acervular or pycnidial conidiomata with holoblastic, annellidic, ampulliform or lageniform conidiogenous cells; conidia range from aseptate to transeuseptate, come in various colors, and often bear appendages[6,12]. Some species of Amphisphaeriales are mainly saprobes, pathogens or endophytes on plants[6]. Some Arthrinium species, such as Arthrinium phaeospermum, were reported as human pathogens causing cutaneous mycosis[13]. Members of Amphisphaeriales exhibit diverse bioactivities with practical applications; for example, Arthrinium arundinis has been utilized as an antifungal agent in pharmaceuticals[14]. Similarly, Seiridium species produce seiridins because of their phytotoxicity and antimicrobial potential[15]. Currently, Amphisphaeriales comprises 16 families and two incertae sedis genera[16]. In this study, we investigate three families (Apiosporaceae, Beltraniaceae, and Sporocadaceae) by refining their taxonomic boundaries and clarifying phylogenetic relationships. This study addresses the gaps in knowledge about this fungal group in China and establishes a robust classification framework, demonstrating significant academic value.

      The family Apiosporaceae was established to accommodate fungal genera that was characterized by apiosporous hyaline ascospores and a basauxic, Arthrinium-like mode of conidiogenesis[17]. Saccardo established the genus Apiospora, designating A. montagnei as its type species[18]. The genus Arthrinium was established with Arthrinium caricicola as its type species by Schmidt and Kunze[19] and validated by Fries[20]. Based on the principles advocated by Hawksworth[21], Crous and Groenewald[22] synonymized the sexual genus Apiospora with Arthrinium and prioritized the use of the latter. Five genera were established in Apiosporaceae: Appendicospora, Arthrinium, Dictyoarthrinium, Endocalyx, and Nigrospora[10]. Samarakoon and Konta have subsequently segregated the genera Dictyoarthrinium, Endocalyx, and Appendicospora from the Apiosporaceae based on a series of phylogenetic analyses[11,23,24]. Pintos and Alvarado[25] proposed the taxonomic separation of Apiospora and Arthrinium by integrating genetic fragments and morphological and ecological data. Thus, the family Apiosporaceae currently accommodates three genera: Apiospora, Arthrinium, and Nigrospora. Notably, the Apiospora contains various species that are difficult to distinguish because of their highly similar morphological characteristics. However, Apiospora and Arthrinium can be distinguished based on three primary characteristics: 1) conidial morphology: Apiospora appears nearly spherical and lenticular with a pale equatorial slit, whereas Arthrinium exhibits an angular, curved, boat-shaped, fusiform, and polygonal morphology[22,2528]; 2) host preference: Apiospora predominantly colonizes Poaceae and other plants, while Arthrinium occurs mainly on Cyperaceae or Juncaceae[28,29]; and 3) biogeography: Apiospora is common in tropical and subtropical regions, but Arthrinium is frequently reported from temperate, cold, or alpine habitats[25,28,29].

      The fungal tribe Beltranieae was established by a single genus Beltrania[30]. Nannizzi[31] later introduced the Beltraniaceae to accommodate Beltrania and its similar genera, thereby treating the earlier tribe as a synonym. Five genera, including Beltrania, Beltraniella, Beltraniopsis, Parapleurotheciopsis, and Pseudobeltrania, were emended to Beltraniaceae by Crous et al.[32]. Then, Rajeshkumar et al. expanded the family Beltraniaceae[33] by adding two other genera: Hemibeltrania and Porobeltraniella. Subsequently, four other Beltrania-like genera were proposed: Pseudosubramaniomyces was established by its type species, Pseudosubramaniomyces fusisaprophyticus[34]; Subsessila was established by its type species Subsessila turbinate, collected from an unidentified decaying leaf in Thailand[35]; Anabeltraniomyces and Parabeltrania were established with Anabeltraniomyces maximus as the type species from Clusia sp. and with Parabeltrania persianiae as the type species from indeterminate dead leaves, respectively, in Costa Rica in 2024[36]. Liu et al.[37] developed a dichotomous key to facilitate the identification of 11 genera within Beltraniaceae.

      Sporocadaceae was originally established by Corda[38] to accommodate the genera Sporocadus, Pestalozzia (currently Pestalotia), and Prosthemium. For a considerably long period, Sporocadaceae was synonymized with Amphisphaeriaceae[39]. Sporocadaceae was resurrected by Jaklitsch et al.[4]. Liu et al.[40] established a relatively robust classification system for Sporocadaceae based on morphology and multi-gene phylogenetics. Pestalotiopsis, as an important taxon in Sporocadaceae, was established to accommodate species with 4-septate conidia[41]. However, these pestalotioid taxa pose a challenge for accurate identification due to their high degree of morphological similarity, particularly in the absence of molecular data[12]. Phylogenetic analysis of large subunit of ribosomal DNA (LSU) alignment, together with literature and morphological appraisal, defined the segregation of Neopestalotiopsis and Pseudopestalotiopsis from Pestalotiopsis[42]. Liu et al.[43] reported that the internal transcribed spacer (ITS) sequence lengths of Neopestalotiopsis was 480–484 bp, that of Pestalotiopsis was 489–495 bp, and that of Pseudopestalotiopsis was 536–540 bp. Razaghi et al. further revealed that whole-genome sizes of Neopestalotiopsis (49.73–53.78 Mbp) and Pseudopestalotiopsis (50.41–51.91 Mbp) are generally larger, but that of Pestalotiopsis is the smallest (< 50 Mbp)[44].

      In this study, we collected decaying plant materials, diseased leaves, and healthy leaves from eight provinces in China from 2022 to 2025. Through morphological comparisons and multi-gene phylogenetic analysis, a total of 71 species in the Amphisphaeriales were identified, comprising 38 new species and 33 known species, with A. locuta-pollinis (syn. A. fuxianhuensis) included among the known species.These findings significantly contribute to our understanding of taxa diversity in the Amphisphaeriales and help in refining its taxonomic framework.

    • Between 2022 and 2025, plant specimens were collected from eight provinces across China. The distribution and predominant habitat types of samples were as follows: Fujian (1,230 specimens, natural forest and farmland), Guangdong (372 specimens, natural forest and farmland), Guangxi (500 specimens, natural forest and farmland), Guizhou (203 specimens, natural forest), Hainan (3,090 specimens, natural forest, farmland, riparian wetland, bamboo forest, and tea plantation), Shandong (345 specimens, natural forest, and farmland), Sichuan (183 specimens, alpine meadow, and bamboo forest), and Yunnan (304 specimens, natural forest, and alpine meadow). The time, geography, and host plant information were recorded for all these samples. Then, they were all preserved for further analysis. Pure colonies were isolated using the tissue method. The strains were deposited in 15% sterile glycerol at 4 °C. Typical specimens were preserved in the Herbarium of the Department of Plant Pathology, Shandong Agricultural University, Shandong, China (HSAUP). Living cultures were deposited in the Shandong Agricultural University Culture Collection (SAUCC) and China General Microbiological Culture Collection Center (CGMCC). After 7 or 14 days of growth on PDA, we recorded the morphological information of the isolates colony and photographed the plate surfaces (obverse and reverse) with a Canon G7X digital camera (Canon, Tokyo, Japan). Morphological features were described using two media: water agar (WA) with or without pine needles and potato dextrose agar (PDA) without pine needles. Fungal microstructures were observed using a stereomicroscope (Olympus SZ61, Olympus Corporation, Tokyo, Japan) and microscope (Olympus BX53, Olympus Corporation, Tokyo, Japan) with differential interference contrast (DIC), and subsequently captured using attached digital cameras (BioHD-A20c, FluoCa Scientific, Shanghai, China). We randomly measured the microstructures using Digimizer software v5.6.0 (www.digimizer.com) and calculated the average size (av.), with "n" indicating the total number of measurements.

      The abbreviations of genera are as follows: A. = Apiospora, B. = Beltraniella, Neo. = Neopestalotiopsis, Nig. = Nigrospora, P. = Pestalotiopsis, and Ps. = Pseudopestalotiopsis. Newly introduced fungal species were registered with the Fungal Names database (https://nmdc.cn/fungalnames/)[45].

    • Genomic DNA was extracted using the modified CTAB method[46] or magnetic fungi DNA extraction kit (DC112-C7, VAMNE Magnetic Bacteria/Fungi DNA Extraction Kit [Prepackaged], Vazyme Biotech Co.,Ltd). The respective primers and different conditions for the PCR are detailed in Table 1. The PCR amplification reactions were performed in a 25 μL mixture containing 12.5 μL of 2 × Hieff Canace Plus PCR Master Mix (AG12202, Accurate Biotechnology, ChangSha, China), 1 μL each of forward and reverse primers (TsingKe, Qingdao, China), 1 μL of template genomic DNA, and nuclease-free water to adjust the final volume. The amplified products were separated by electrophoresis on a 1% agarose gel (Cat. Nos. RM02852, ABclonal Biotechnology Co., Ltd., Wuhan, China) stained with GelStain (GS101; TransGen Biotech, China) and then visualized under UV light. Target bands were excised from the gel, purified using a commercial gel extraction kit (DM1200, Beijing Solarbio Science & Technology Co., Ltd.), and subsequently sent for sequencing to Youkang Company Limited (Zhejiang, China).

      Table 1.  Molecular markers, and all PCR primers and programs used in this study.

      Loci PCR primers Sequence (5′→3′) PCR cycles Ref.
      ITS ITS5 GGA AGT AAA AGT CGT AAC AAG G 95 °C 5 min; (95 °C 30 s, 55 °C 30 s, 72 °C 1 min) × 35 cycles [47]
      ITS4 TCC TCC GCT TAT TGA TAT GC
      LSU LR0R GTA CCC GCT GAA CTT AAG C 95 °C 5 min; (95 °C: 30 s, 52 °C: 30 s, 72 °C: 1 min) × 35 cycles [48,49]
      LR5 TCC TGA GGG AAA CTT CG
      tef1-α EF1-728F CAT CGA GAA GTT CGA GAA GG 95 °C 5 min; (95 °C 30 s, 55 °C 60 s, 72 °C 1 min) × 30 cycles [50,51]
      EF2 GGA RGT ACC AGT SAT CAT GTT
      tub2 Bt-2a GGT AAC CAA ATC GGT GCT GCT TTC 95 °C 5 min; (95 °C: 30 s, 53 °C: 30 s, 72 °C: 1 min) × 35 cycles [52]
      Bt-2b ACC CTC AGT GTA GTG ACC CTT GGC
    • PHI tests were conducted on concatenated multilocus datasets using SplitsTree software, with Φw values <0.05, indicating significant recombination[53,54]. Phylogenetic relationships were visualized through split graphs generated via Log-Det transformation and split decomposition methods.

    • Species identity was confirmed for all assembled sequences through BLAST searches against the GenBank database[55]. All sequences were aligned using MAFFT v.7 online service (https://mafft.cbrc.jp/alignment/server/) and then adjusted by MEGA v7.0[56]. We deposited the nucleotide sequences in the NCBI’s GenBank nucleotide database (www.ncbi.nlm.nih.gov). The newly-generated sequences (Supplementary Information 2) were aligned with related sequences (Supplementary Information 38). The phylogenetic trees were generated using maximum likelihood (RAxML-HPC2 on XSEDE v.8.2.12) and Bayesian inference (MrBayes v.3.2.7a, Linux)[57]. In the phylogenetic trees, all tested isolates are highlighted in red. The phylogenetic tree visualizations were generated using ITOL (Interactive Tree of Life: https://itol.embl.de)[58] and final layout adjustments made in Adobe Illustrator CS6 (Adobe Systems Inc., USA).

    • The samples were collected from eight provinces of China and the collected strains majorly consisted of species belonging to Apiosporaceae (Apiospora, Nigrospora), Beltraniaceae (Beltraniella), and Sporocadaceae (Neopestalotiopsis, Pestalotiopsis, and Pseudopestalotiopsis). Consequently, 71 species are described (Table 2), representing six genera: Apiospora, Nigrospora, Beltraniella, Neopestalotiopsis, Pestalotiopsis, and Pseudopestalotiopsis. Details of known species are provided in Supplementary Information 1[59114].

      Table 2.  Content of fungal species in this study.

      Phylum: Ascomycota
      Subphylum: Pezizomycotina
      Class: Sordariomycetes O.E. Erikss. & Winka
      Order: Amphisphaeriales D. Hawksw. & O.E. Erikss.
      Family: Apiosporaceae K.D. Hyde, J. Fröhl., Joanne E. Taylor & M.E. Barr
      Genus: Apiospora Sacc.
      1. Apiospora adinandrae X.Y. Liu, Z.X. Zhang and X.G. Zhang, Journal of Fungi 10 (1, no. 74): 6 (2024) (new host record)
      2. Apiospora alpiniae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      3. Apiospora arecacearum L.S. Dissan., K.D. Hyde & J.C. Kang, Mycosphere 15 (1): 1675–1793 (2024) (new host and geographical records)
      4. Apiospora babylonica H. Sheng, Z.X. Zhang & X.G. Zhang, Microorganisms 12: 1372 (2024) (new host and geographical records)
      5. Apiospora baihualingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      6. Apiospora bambusicaulis K.M. Yu & Y.L. Jiang, MycoKeys 112: 233–252 (2025) (new geographical record)
      7. Apiospora baotingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      8. Apiospora yinggelingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      9. Apiospora campsidis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      10. Apiospora changjiangensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      11. Apiospora chiangraiense X.G. Tian & Tibpromma S, Life 11: 1071 (2021) (new host and geographical records)
      12. Apiospora clavata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      13. Apiospora danzhouensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      14. Apiospora dematiacea C.F. Liao & Doilom, Journal of Fungi 9 (no. 1087): 10 (2023) (new host and geographical records)
      15. Apiospora diaoluoshanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      16. Apiospora dryopteris Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      17. Apiospora elongata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      18. Apiospora guangdongensis J.Y. Zhang & Y.Z. Lu, Journal of Fungi 9 (no. 1096): 12 (2023) (new geographical record)
      19. Apiospora guangzhouensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      20. Apiospora hainanensis R.Y. Liu, J.W. Xia & X.G. Zhang, MycoKeys 95: 37 (2023)
      21. Apiospora hydei (Crous) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 207 (2021)
      22. Apiospora hysterina (Sacc.) Pintos & Alvarado, Fungal Systematics and Evolution 7:206P. (2021)
      23. Apiospora intestini (Kajale, Sonawane & Rohit Sharma) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 206 (2021) (new host and geographical records)
      24. Apiospora pseudosasae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      25. Apiospora jiangxiensis (Mei Wang & L. Cai) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 206 (2021) (new geographical record)
      26. Apiospora lageniformis S.L. Kwon & J.J. Kim, Mycobiology 50 (5): 302–316 (2022) (new host and geographical records)
      27. Apiospora armeniaca H. Sheng, Z.X. Zhang & X.G. Zhang, Microorganisms 2024, 12, 1372 (new host and geographical records)
      28. Apiospora lingshuiensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      29. Apiospora locuta-pollinis (F. Liu & L. Cai) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 207 (2021) (new host record)
      30. Apiospora longistroma (D.Q. Dai & K.D. Hyde) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 207 (2021) (new geographical record)
      31. Apiospora multiplex Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      32. Apiospora pingtangensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      33. Apiospora pseudoparenchymatica (M. Wang & L. Cai) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 207 (2021) (new geographical record)
      34. Apiospora cyclobalanopsidis (Yao Feng & Jian K. Liu) X.G. Tian & Tibpromma, in Tian, Karunarathna, Mapook, Promputtha, Xu, Bao & Tibpromma, Life 11 (no. 1071): 17 (2021) (new host and geographical records)
      35. Apiospora qiongzhongensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      36. Apiospora renhuaensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      37. Apiospora rutila Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      38. Apiospora shaoguanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      39. Apiospora taianensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      40. Apiospora teapae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      41. Apiospora ventricosa Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      42. Apiospora wuyishanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      43. Apiospora xiangxiensis X.Y. Chang & M.J. Chen, MycoKeys 116: 214 (2025) (new host and geographical records)
      44. Apiospora zingiberis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      Genus: Nigrospora Zimm.
      45. Nigrospora bambusae Mei Wang & L. Cai, Persoonia 39: 127 (2017) (new geographical record)
      46. Nigrospora brasiliensis A.C.Q. Brito, C. Conforto, A.R. Machado, Persoonia 42: 439 (2019) (new host and geographical records)
      47. Nigrospora buddlejae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      48. Nigrospora camelliae-sinensis Mei Wang & L. Cai, Persoonia 39: 127 (2017) (new host record)
      49. Nigrospora chinensis Mei Wang & L. Cai, Persoonia 39: 129 (2017) (new host record)
      50. Nigrospora helwingiae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      51. Nigrospora lacticolonia Mei Wang & L. Cai, Persoonia 39: 06 (2017) (new host record)
      52. Nigrospora officinalis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      53. Nigrospora oryzae (Berk. & Broome) Petch (1924) (new host record)
      54. Nigrospora penniseti Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      55. Nigrospora pseudosasae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      56. Nigrospora pyriformis Mei Wang & L. Cai, Persoonia 39: 126 (2017) (new host record)
      57. Nigrospora rubi Mei Wang & L. Cai, Persoonia 39: 127 (2017) (new host and geographical records)
      58. Nigrospora sacchari-officinarum M. Raza & L. Cai, Fungal Diversity 99: 95 (2019) (new host record)
      59. Nigrospora vesicularifera M. Raza & L. Cai, Fungal Diversity 99: 96 (2019) (new host record)
      Family: Beltraniaceae Nann.
      Genus: Beltraniella Subram.
      60. Beltraniella obovata D.H. Li, J.W. Xia & X.G. Zhang, sp. nov.
      Family: Sporocadaceae Corda
      Genus: Neopestalotiopsis Maharachch., K.D. Hyde & Crous
      61. Neopestalotiopsis bambooensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      62. Neopestalotiopsis mianyangensis W.L. Li & Jian K. Liu, Journal of Fungi 8: 10 (2022) (new host record)
      Genus: Pestalotiopsis Steyaert
      63. Pestalotiopsis castanopsis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      64. Pestalotiopsis dracaenae Yong Wang bis, Y. Song, K. Geng & K.D. Hyde, Fungal Diversity 75: 164 (2015) (new host record)
      65. Pestalotiopsis hydei Huanraluek & Jayaward, Phytotaxa 479 (1): 023–043 (2021) (new host and geographical records)
      66. Pestalotiopsis nanpingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      67. Pestalotiopsis rhizomaticola Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      68. Pestalotiopsis rostrata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      69. Pestalotiopsis smilacicola Y.R. Sun & Yong Wang bis, Microbiology Spectrum 11(1): e03987-22, 15 (2023) (new host and geographical records)
      70. Pestalotiopsis yuxiensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
      Genus: Pseudopestalotiopsis Maharachch., K.D. Hyde & Crous
      71. Pseudopestalotiopsis xishuangbannaensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov.
    • Amphisphaeriales D. Hawksw. & O.E. Erikss.

      Notes: Amphisphaeriales was established within the subclass Xylariomycetidae[1]. Sixteen families and two Amphisphaeriales genera incertae sedis are accepted[16]. A dichotomous key for Amphisphaeriales is provided in Supplementary Information 9.

    • Notes: Apiosporaceae was established to accommodate genera with basauxic conidiogenesis[17]. The family Apiosporaceae included Apiospora, Arthrinium, and Nigrospora[16].

      Apiospora Sacc.

      Notes: Saccardo[18] introduced the genus Apiospora with Apiospora montagnei as its type species. Apiospora conidia appear more or less rounded and lenticular[115]. Apiospora species have a worldwide distribution and a broad host range, existing primarily as endophytes, pathogens, or saprobes on plants[68,73]. Most of the species have been isolated from diverse sources such as air, lichens, soil, seaweeds, and animal tissues. A few species act as human pathogens, causing cutaneous infections[64].

      In the phylogenetic tree containing 384 Apiospora isolates, the strain Arthrinium caricicola (CBS 145127) acted as the outgroup. The alignment sequences have 2,898 concatenated nucleotide bases, viz. 1–868 (ITS), 869–1,704 (LSU), 1705–2,203 (tub2), and 2,204–2,898 (tef1-α). Among these sequences, 1,522 characters were constant, 170 characters were variable and parsimony-uninformative, and 1,206 characters were parsimony-informative. As the topologies were consistent in the ML and BI analyses, only the ML tree is shown in this study. The 383 tested strains were identified as belonging to 166 species based on the phylogenetic analysis of ITS, LSU, tef-1α, and tub2 genes. BI analysis was conducted on 6,265,000 generations of 12,532 trees; 3/4 of the trees were used to compute the posterior probability using the majority-rule consensus tree method (Fig. 1; first value: Bayesian inference posterior probability [BIPP] ≥ 0.90 displayed).

      Figure 1. 

      Phylogenetic tree of the genus Apiospora based on the alignment of ITS, LSU, tef1-α, and tub2 sequences, with Arthrinium caricicola serving as the outgroup. The Bayesian inference posterior probability (left, BIPP ≥ 0.90) and the maximum likelihood bootstrap value (right, MLBV ≥ 70%) are shown as BIPP/MLBV above the nodes. Strains marked "*" in the tree are represented as ex-type or ex-epitype. Strains in this study are highlighted in red. The scale bar at the bottom indicates 0.01 substitutions per site. Furthermore, four single-gene trees were evaluated for Apiospora (Supplementary Information 10).

      Apiospora alpiniae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 2

      Figure 2. 

      Apiospora alpiniae (CGMCC 3.29207, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573274

      Etymology: The epithet "alpiniae" indicates the host genus of the holotype, specifically Alpinia zerumbet.

      On PDA. Asexual morph: hyphae 1.53–3.60 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells 5.97–19.43 × 3.05–5.35 µm (av. = 13.48 ± 4.68 × 4.10 ± 0.82 μm, n = 18) are produced from hyphae, and are holoblastic, hyaline, cylindrical, straight, aseptate, smooth-walled, and guttulate. Conidia 6.18–19.48 × 3.77–7.83 μm (av. = 9.57 ± 3.71 × 5.81 ± 0.89 μm, n = 24) from hyphae, and are globose, subglobose to cylindric-clavate, aseptate, dark brown, smooth to slightly rough, and guttulate, with a pale equatorial slit.

      Culture characteristics – The colony surfaces are white, flat, and floccose, with abundant aerial mycelia, colony margin entire and reverse red in the center, and white at the margin on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.6786181 N, 109.9481903 E, 150.6 m), on diseased Alpinia zerumbet leaves, 27 March 2024, Q.Y. Liu (HSAUP 7430-1, holotype), ex-type culture CGMCC 3.29207 = SAUCC 7430-1; ibid., Ledong Li Autonomous County, Jianfengling National Forest Park (18.700142 N, 108.812270, 126 m), on diseased leaves of Bambusa ventricosa, 4 December 2024, Q.Y. Liu (HSAUP 14447-3), living cultures SAUCC 14447-3.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Alpinia zerumbet and Bambusa ventricosa.

      Notes – The phylogenetic analysis showed that our isolates are genetically similar to A. cannae (ZHKUCC 22-0127, ex-type) and A. sacchari (CBS 372.67, ex-type), forming a distinct subclade. Apiospora alpiniae and A. cannae (ZHKUCC 22-0127, ex-type) showed nucleotide differences in the ITS (2/489 bp), LSU (2/788 bp), tef1-α (4/387 bp), and tub2 (5/419 bp) gene regions. Apiospora alpiniae and A. sacchari (CBS 372.67, ex-type) showed nucleotide differences in the ITS (6/518 bp), tef1-α (3/387 bp), and tub2 (7/419 bp) gene regions. Morphologically, Apiospora alpiniae has large conidiogenous cells and conidia than A. sacchari (5.97–19.43 × 3.05–5.35 vs. 5–12 × 2.5–4 μm; 6.18–19.48 vs. 6–8 μm)[22]. Apiospora alpiniae has shorter conidiogenous cells than A. cannae (5.97–19.43 vs. 20–25 μm)[83]. Thus, Apiospora alpiniae was established as a new species.

      Apiospora baihualingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 3

      Figure 3. 

      Apiospora baihualingensis (CGMCC 3.29212, ex-type culture). (a, b) Colonies after incubation on PDA for 7 days; top view (a) and bottom view (b). (d) Conidiomata formed in culture. (c, e) Conidiophores and conidiogenous cells giving rise to conidia. (f, g) Conidia developed from conidiogenous cells. (h, i) Conidia. Scale bars: 10 μm (e–i).

      Fungal names: FN 573275

      Etymology – The epithet "baihualingensis" indicates the geographical location of the holotype, specifically Baihualing Tropical Rainforest Cultural Tourism Zone, Hainan Province.

      On PDA. Asexual morph: hyphae 2.32–5.36 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores 34.37–95.12 × 3.16–3.34 µm (av. = 64.75 ± 42.95 × 3.25 ± 0.13 μm, n = 2), hyaline to pale brown, unbranched, straight or flexuous, smooth, guttulate, aseptate. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 4.97–12.82 × 3.35–5.85 µm (av. = 8.76 ± 3.17 × 4.13 ± 0.86 μm, n = 18), from hyphae or conidiophores, holoblastic or polyblastic, hyaline to pale brown, cylindrical to ampulliform, straight, aseptate, smooth-walled, guttulate. Conidia 7.36–13.88 × 5.44–8.07 μm (av. = 9.23 ± 1.83 × 7.13 ± 0.76 μm, n = 23), globose to subglobose, aseptate, pale brown to dark brown from immature to mature, smooth to slightly rough, guttulate, without the pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium moderate, margin entire, surface white, and reverse side is light brown in the center and white at the edges. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Qiongzhong Li and Miao Autonomous County, Baihualing Tropical Rainforest Tourism and Culture Zone (19.005802 N, 109.825167 E, 392 m), on diseased bamboo leaves (Poaceae sp.), 3 December 2023, Q.Y. Liu (HSAUP 14296-2A, holotype), ex-type culture CGMCC 3.29212 = SAUCC 14296-2A; ibid., HSAUP 14296-2B, living culture SAUCC 14296-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – Apiospora baihualingensis belongs to the large clade, where it shows a relationship with A. diaoluoshanensis. Apiospora baihualingensis differs from A. diaoluoshanensis (SAUCC 7508-4A, ex-type) by having larger conidia (7.36–13.88 × 5.44–8.07 vs. 5.71–10.10 × 3.75–7.15 μm), longer conidiogenous cells (4.97–12.82 × 3.35–5.85 vs. 1.83–9.29 × 1.72–3.70 µm), and the presence of 12 distinct nucleotide positions (2/520 bp [99.6%] in ITS, 9/424 bp [97.9%] in tef1-α, 1/368 bp [99.7%] in tub2). Thus, Apiospora baihualingensis as a new species. For details, see Supplementary Information 11.

      Apiospora baotingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 4

      Figure 4. 

      Apiospora baotingensis (CGMCC 3.29222, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i) Conidia. Scale bars: 10 μm. (e–i).

      Fungal names: FN 573276

      Etymology – The epithet "baotingensis" refers to the location where the type was collected, Baoting County, Hainan Province.

      On diseased bamboo leaves. Asexual morph: hyphae 1.3–2.5 μm diameter, hyaline, branched, thick-walled, septate. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells 8.1–18.0 × 1.7–2.7 µm (av. = 12.1 ± 2.9 × 2.2 ± 0.3 μm, n = 19), holoblastic or polyblastic, hyaline, cylindrical, straight, aseptate, smooth-walled. Conidia 6.2–7.7 × 4.4–7.5 μm (av. = 6.9 ± 0.5 × 6.1 ± 0.9 μm, n = 20), globose to subglobose, aseptate, smooth, dark brown, with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium abundant, filiform, margin undulate, surface white and reverse yellowish white. The diameter of the colony was 52 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Baoting County, Diaoluoshan National Forest Park (18.4452181 N, 109.451703 E, 850 m), on diseased leaves of bamboo (Poaceae sp.), 27 March 2024, Y.X. Shang (HSAUP 7464-1A, holotype), ex-type culture CGMCC 3.29222 = SAUCC 7464-1A; ibid., HSAUP 7464-1B, living culture SAUCC 7464-1B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – Based on phylogenetic analysis, the two isolates of the new species A. baotingensis cluster with A. changjiangensis. Two species showed nucleotide differences in the ITS (3/520 bp), LSU (1/735 bp), tef1-α (15/417 bp), and tub2 (15/384 bp) gene regions. Morphologically, A. baotingensis differs significantly from A. changjiangensis in having longer conidiogenous cells (8.1–18.0 × 1.7–2.7 vs. 3.66–12.53 × 1.23–4.75 µm), and A. baotingensis possesses sterile cells. Thus, we described A. baotingensis as a new species.

      Apiospora yinggelingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 5

      Figure 5. 

      Apiospora yinggelingensis (CGMCC 3.29235, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–j) Conidia developed from conidiogenous cells. (k–n) Conidia. Scale bars: 10 μm (e–n).

      Fungal names: FN 573277

      Etymology – The epithet "yinggelingensis" refers to the location where the type was collected, Yinggeling National Forest Park, Hainan Province.

      On diseased bamboo leaves. Asexual morph: hyphae 1.9–5.7 μm diameter, micronematous, hyaline, branched, thick-walled, septate, guttulate. Conidiophores are cylindrical, septate, verrucose and flexuous, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 3.2–7.8 μm diameter (av. = 4.85 ± 1.46, n = 19), arise from hyphae; they are holoblastic, monoblastic, hyaline, cylindrical, straight, aseptate and smooth-walled. Conidia 13.5–21.3 × 15.5–23.9 μm diameter (av. = 19.0 ± 1.9 × 20.1 ± 1.8 μm, n = 35), globose to subglobose, aseptate, smooth, hyaline to dark brown from immature to mature, with a pale equatorial slit.

      Culture characteristics – The colony surfaces are white, flat, spreading, filiform, with abundant aerial mycelia and reverse pale yellow on the PDA medium. The diameter of the colony was 64.5 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Changjiang Li Autonomous County, Yinggeling National Forest Park (19.117621 N, 109.150697 E, 650.05 m), on diseased bamboo leaves (Poaceae sp.), 11 April 2023, J. Zhang (HSAUP 3634-2A, holotype), ex-type culture CGMCC 3.29235 = SAUCC 3634-2A; ibid., HSAUP 3634-2B, living culture SAUCC 3634-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Phylogenetic analysis indicated that the two strains of A. bawanglingensis sp. nov. were clustered in a separate clade, exhibiting a close relationship with A. hyphopodii. The nucleotide differences in the ITS gene regions between our strains and A. hyphopodii (MFLUCC 15-0003, ex-type) are 8/507 bp. Morphologically, our isolates differ significantly from A. hyphopodii (MFLUCC 15-0003, ex-type) in possessing wider conidiogenous cells (3.2–7.8 vs. 2–3.5 μm) and larger conidia (13.5–21.3 × 15.5–23.9 vs. 5–10 × 4–8 μm). Mature conidia of A. yinggelingensis exhibit a color spectrum ranging from hyaline to dark brown. Arthrinium hyphopodii was originally identified in the bamboo of Yunnan Province, China[6]. It was subsequently synonymized under A. hyphopodii based on phylogenetic evidence[25]. Thus, we described A. yinggelingensis as a new species.

      Apiospora campsidis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 6

      Figure 6. 

      Apiospora campsidis (CGMCC 3.29234, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and top view (c). (d) Conidiomata formed in culture. (e–g, i) Conidiophores and conidiogenous cells giving rise to conidia. (h) Conidia developed from conidiogenous cells. (j) Conidia. (k) Hyphae and conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573278

      Etymology – The epithet "campsidis" refers to the host of the holotype, specifically Campsis radicans.

      On diseased Campsis radicans leaves. Asexual morph: hyphae 1.6–3.9 μm diameter, micronematous, hyaline to pale brown, branched, thick-walled, septate. Conidiophores 13.98–39.36 × 2.37–4.50 µm (av. = 24. 49 ± 8.59 × 3.50 ± 0.62 μm, n =10), hyaline, septate, smooth, and thin-walled. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells 7.41–16.49 × 2.97–5.96 µm (av. = 10.47 ± 3.43 × 4.30 ± 0.77 μm, n = 14) arising from hyphae, holoblastic or polyblastic, hyaline to pale brown, cylindrical, straight, smooth-walled. Conidia 14.26–21.12 × 8.96–17.29 µm (av. = 16.31 ± 2.03 × 17.29 ± 2.21 μm, n = 18), globose, ellipsoidal to cylindrical, aseptate, hyaline to dark brown from immature to mature, smooth, guttulate, without the pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium moderate, spreading, margin irregular, surface and reverse white to pale brown. The diameter of the colony was 44.2–57.2 mm after culturing for 7 days at 25 °C.

      Material examined – China, Fujian Province, Wuyishan City (27.644737 N, 117.883815 E, 239.5 m), on diseased Campsis radicans leaves (Bignoniaceae sp.), 20 October 2024, Q.Y. Liu (HSAUP 11198-2A, holotype), ex-type culture CGMCC 3.29234 = SAUCC 11198-2A; ibid., HSAUP 11198-2B, living culture SAUCC 11198-2B.

      Distribution – China, Fujian Province.

      Ecology – Associated with diseased leaves of Campsis radicans.

      Notes – Apiospora campsidis (SAUCC 11198-2A, ex-type) was found to be phylogenetically related to A. ovata (CBS 115042, ex-type). Two species showed nucleotide differences in the ITS (19/479 bp), LSU (2/750 bp), tef1-α (64/428 bp), and tub2 (34/396 bp) gene regions. Morphologically, A. campsidis can be distinguished from A. ovata by its smaller conidiophores (13.98–39.36 × 2.37–4.50 vs. 60 × 5–7 μm). Additionally, the difference between A. campsidis and A. ovata lies in the fact that the conidial morphologies of A. campsidis range from globose, ellipsoidal to cylindrical, while those of A. ovata range from oval to broadly ellipsoid. Apiospora ovate produces sterile cells and medium brown conidia, whereas A. campsidis lacks sterile cells and develops hyaline to dark brown conidia at maturity. Arthrinium ovatum was originally identified by Crous and Groenewald[22] from Arundinaria hindsii in Hong Kong, China. It was subsequently synonymized under A. ovata based on phylogenetic evidence[25]. Thus, we described this fungus as a new species.

      Apiospora changjiangensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 7

      Figure 7. 

      Apiospora changjiangensis (CGMCC 3.29214, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573279

      Etymology – The epithet "changjiangensis" refers to the geographical location of the holotype, specifically Changjiang Li Autonomous County.

      On PDA. Asexual morph: hyphae 1.17–3.31 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells 3.66–12.53 × 1.23–4.75 µm (av. = 6.97 ± 2.64 × 2.57 ± 1.07 μm, n = 22), holoblastic, hyaline, ampulliform or cylindrical, straight or pale curved, aseptate, smooth-walled. Conidia 5.39–7.79 × 4.04–6.96 μm (av. = 6.67 ± 0.57 × 5.66 ± 0.78 μm, n = 37), globose to subglobose, aseptate, brown, smooth to slightly rough, with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium moderate, margin undulate, surface and reverse white to pale orange. The diameter of the colony was 59.16–75.00 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park (19.0859333 N, 109.122752 E, 462 m), on diseased leaves of bamboo (Poaceae sp.), 14 October 2023, Q.Y. Liu (HSAUP 6530-4A, holotype), ex-type culture CGMCC 3.29214 = SAUCC 6530-4A; ibid., HSAUP 6530-4B, living culture SAUCC 6530-4B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – Apiospora changjiangensis (SAUCC 6530-4A, ex-type) was found to be phylogenetically related to A. ventricosa (SAUCC 14311-2A, ex-type). Two species showed nucleotide differences in the ITS (2/520 bp), LSU (2/744 bp), tef1-α (11/423 bp), and tub2 (2/386 bp) gene regions. Morphologically, A. changjiangensis differs significantly from A. ventricosa (SAUCC 14311-2A, ex-type) in possessing larger conidiogenous cells (3.66–12.53 × 1.23–4.75 vs. 2.65–5.06 × 2.55–3.61 µm), and A. changjiangensis has conidiophores, which are reduced to conidiogenous cells. Thus, Apiospora changjiangensis was described as a new species.

      Apiospora clavata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 8

      Figure 8. 

      Apiospora clavata (CGMCC 3.29208, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–g) Conidia developed from conidiogenous cells. (h) Conidia developed from conidiophores. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573280

      Etymology – the epithet "clavata" refers to the clavate conidia.

      On PDA. Asexual morph: hyphae 1.53–3.75 μm diameter, hyaline to pale yellow, branched, thick-walled, guttulate, septate. Conidiophores 18.53–126.98 × 2.09–4.66 µm (av. = 65.73 ± 40.47 × 2.98 ± 0.96 μm, n = 16), hyaline, unbranched, straight or flexuous, verrucose, septate. Conidiogenous cells 3.35–12.57 × 1.93–5.02 µm (av. = 7.85 ± 3.09 × 3.62 ± 0.84 μm, n = 16), polyblastic, hyaline, cylindric-clavate, straight, aseptate, smooth-walled. Conidia 5.82–21.11 × 3.41–7.99 μm (av. = 8.09 ± 3.01 × 6.23 ± 0.99 μm, n = 42), globose, subglobose to clavate, aseptate, dark brown, smooth to slightly rough, guttulate, without the pale equatorial slit.

      Culture characteristics – The colony surfaces are white, flat, with abundant aerial mycelia and reverse white on the PDA medium. The diameter of the colony was 90 mm after culturing at 7 days at 25 °C.

      Material examined – China, Hainan Province, Ledong Li Autonomous County, Jianfengling National Forest Park (18.700142 N, 108.812270 E, 126 m), on diseased leaves of Bambusa multiplex f. livida, 4 December 2024, Q.Y. Liu (HSAUP 14477-1A), ex-type culture CGMCC 3.29208 = SAUCC 14477-1A; ibid., HSAUP 14477-1B, living culture SAUCC 14477-1B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Bambusa multiplex f. livida.

      Notes – Apiospora clavata belongs to the large clade, and it shows a relationship with A. armeniaca. Apiospora clavata differs from A. armeniaca (SAUCC DL1831, ex-type) in having differently shaped (globose, subglobose to clavate vs. globose to subglobose to lenticular) and larger conidia (5.82–21.11 × 3.41–7.99 vs. 6.2–7.3 × 4.8–6.1 μm), longer conidiogenous cells (3.35–12.57 × 1.93–5.02 vs. 5.3–6.8 × 4.1–5.6 μm), and 8 fixed nucleotide differences in the tef1-α gene (8/383 bp)[62]. Therefore, we introduced A. clavata as a new species.

      Apiospora danzhouensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 9

      Figure 9. 

      Apiospora danzhouensis (CGMCC 3.29204, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–i) Conidia developed from conidiogenous cells. (j, k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573281

      Etymology – The epithet "danzhouensis" refers to the geographical origin of the strains, namely, Danzhou City, Hainan Province.

      On diseased bamboo leaves. Asexual morph: hyphae 1.23–6.39 μm diameter, hyaline, branched, thick-walled, septate or aseptate. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells 6.31–23.81 × 1.16–4.07 µm (av. = 13.63 ± 5.48 × 2.57 ± 0.79 μm, n = 20) aggregated in clusters on hyphae, holoblastic, hyaline or medium brown, cylindrical, straight or curved, aseptate, smooth-walled. Conidia 12.13–20.72 × 6.97–15.80 μm (av. = 15.64 ± 1.91 × 12.81 ± 1.56 μm, n = 38), globose to cylindric-clavate, aseptate, dark brown, smooth to slightly rough, guttulate, hyaline, transitioning to pale brown and becoming dark brown when fully mature, without a central scar.

      Culture characteristics – The colony surfaces are white, woolly, flat, spreading, filiform, with abundant aerial mycelia, margin lightly sparse and reverse yellowish white on the PDA medium. The diameter of the colony was 74.85–77.32 mm after culturing at 7 days at 25 °C.

      Material examined – China, Hainan Province, Danzhou City, Hainan Tropical Botanical Garden (19.511933 N, 109.500840 E, 108 m), on diseased bamboo leaves (Poaceae sp.), 15 October 2023, H.D. Li (HSAUP 6688-4, holotype), ex-type culture CGMCC 3.29204 = SAUCC 6688-4; China, Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park (19.085933 N, 109.122752 E, 462.68 m), on diseased bamboo leaves (Poaceae sp.), 14 October 2023, W.W. Liu, HSAUP 6580-3, living culture SAUCC 6580-3; ibid., HSAUP 6580-2, living culture SAUCC 6580-2.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – Apiospora danzhouensis (SAUCC 6688-4, ex-type) was found to be phylogenetically related to A. hydei (CBS 114990, ex-type). The two species showed nucleotide differences in the tef1-α (13/405 bp) and tub2 (3/379 bp) gene regions. Morphologically, A. danzhouensis differs from A. hydei in having wider hyphae (1.23–6.39 μm, hyaline vs. 2–3 μm, hyaline to pale brown), longer conidiogenous cells (6.31–23.81 × 1.16–4.07 vs. 5–8 × 4–5 μm), and bigger conidia (12.13–20.72 × 6.97–15.80 μm, without a central scar vs. (15–)17–19(–22) μm diameter in surface view and (10–)11–12(–14) μm diameter in side view, with a central scar)[22]. Thus, we described this fungus as a new species.

      Apiospora diaoluoshanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 10

      Figure 10. 

      Apiospora diaoluoshanensis (CGMCC 3.29211, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e) Conidiophores and conidiogenous cells giving rise to conidia. (f, g) Conidia developed from conidiogenous cells. (h) Conidia. Scale bars: 10 μm (e–h).

      Fungal Names: FN 573282

      Etymology – The epithet "diaoluoshanensis" refers to the geographical location of the holotype, specifically Diaoluoshan National Forest Park, Hainan Province.

      On PDA. Asexual morph: hyphae 2.15–3.42 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores 44.77–79.38 × 2.77–4.20 µm (av. = 58.68 ± 18.27 × 3.65 ± 0.76 μm, n = 8), hyaline, branched or unbranched, straight or flexuous, smooth, guttulate, aseptate. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 1.83–9.29 × 1.72–3.70 µm (av. = 6.11 ± 2.77 × 3.12 ± 0.82 μm, n = 15), sometimes from hyphae, holoblastic, hyaline, cylindrical, straight, aseptate, smooth-walled, guttulate. Conidia 5.71–10.10 × 3.75–7.15 μm (av. = 6.64 ± 0.93 × 5.48 ± 0.87 μm, n = 21), globose, subglobose to lenticular, aseptate, hyaline, pale brown to dark brown, immature to mature, smooth to slightly rough, guttulate, with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium moderate, margin entire, surface and reverse white. The diameter of the colony was 44.2–57.2 mm after culturing at 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.660546 N, 109.936445 E, 94 m), on diseased leaves of bamboo (Poaceae sp.), 27 March 2024, M.Y. Zhang (HSAUP 7508-4A, holotype), ex-type culture CGMCC 3.29211 = SAUCC 7508-4A; ibid., HSAUP 7508-4B, living culture SAUCC 7508-4B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – See the notes of Apiospora baihualingensis.

      Apiospora dryopteris Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 11

      Figure 11. 

      Apiospora dryopteris (CGMCC 3.29219, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days from above (b) and below (c). (d) Conidiomata formed in culture. (e–i) Conidia developed from conidiophores and conidiogenous cells. Scale bars: 10 μm (e–i).

      Fungal names: FN 573283

      Etymology – The epithet "dryopteris" refers to the host of the holotype, specifically Dryopteris fuscipes.

      On diseased leaves of Dryopteris fuscipes. Asexual morph: hyphae 1.8–3.2 μm diameter, hyaline, branched, thick-walled, septate. Conidiophores 20.65–42.75 × 1.72–4.65 µm (av. = 29. 09 ± 8.11 × 3.83 ± 0.91 μm, n =10), hyaline, flexuous, branched, aseptate, smooth and thin-walled. Conidiogenous cells 4.27–19.07 × 2.52–5.89 µm (av. = 11.04 ± 3.44 × 4.10 ± 1.09 μm, n = 23), holoblastic or polyblastic, hyaline to pale brown, cylindrical or ampulliform, straight or flexuous, smooth-walled. Conidia 9.57–23.32 × 5.57–10.11 µm (av. = 12.25 ± 3.11 × 7.97 ± 1.47 μm, n = 27), globose to cylindric-clavate, aseptate, pale brown to dark brown from immature to mature, smooth, guttulate, with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium abundant, margin entire, floccose, surface white, and reverse pale yellow. The diameter of the colony was 90 mm after culturing at 7 days at 25 °C.

      Material examined – China, Yunnan Province, Yuxi City, Yulongma Mountain Scenic Area (24.418646 N, 102.606913 E, 2270 m), on diseased leaves of Dryopteris fuscipes, 12 May 2024, Q.Y. Liu (HSAUP 8289-2A, holotype), ex-type culture CGMCC 3.29219 = SAUCC 8289-2A; ibid., HSAUP 8289-2B, living culture SAUCC 8289-2B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with diseased leaves of Dryopteris fuscipes.

      Notes – Apiospora dryopteris (SAUCC 8289-2A, ex-type) was found to be phylogenetically related to A. wuyishanensis (SAUCC 11013-4A, ex-type). Apiospora dryopteris differs from A. wuyishanensis (SAUCC 11013-4A, ex-type) in its production of significant conidia (globose to cylindric-clavate, 9.57–23.32 × 5.57–10.11 µm vs. globose to ellipsoid, 8.32–10.75 × 6.17–10.13 µm). Two species showed nucleotide differences in the ITS (7/498 bp), LSU (1/737 bp), tef1-α (30/409), and tub2 (24/395) gene regions. Thus, we described this fungus as a new species.

      Apiospora elongata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 12

      Figure 12. 

      Apiospora elongata (CGMCC 3.29205, ex-type culture). (a) Leaf of host plant. (b, c) Colonies after incubation on PDA for 7 days from above (b) and below (c). (d) Conidiomata formed in culture. (e, f) Conidia developed from conidiogenous cells. (g, h) Conidiophores, conidiogenous cells with conidia. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573284

      Etymology – The specific epithet refers to the elongated conidia.

      On diseased bamboo leaves. Asexual morph: hyphae 2.2–4.4 μm diameter, hyaline, branched, thick-walled, septate or aseptate, guttulate. Conidiophores 57.03–82.42 × 2.36–4.52 µm (av. = 73.34 ± 7.93 × 3.41 ± 0.69 μm, n = 20), hyaline, unbranched, straight or flexuous, smooth, guttulate, aseptate. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 9.92–25.92 × 3.02–4.44 µm (av. = 15.35 ± 4.95 × 3.82 ± 0.54 μm, n = 19), holoblastic, hyaline, cylindrical, straight or flexuous, septate or aseptate, smooth-walled, guttulate. Conidia 10.77–28.09 × 4.98–11.84 μm (av. = 18.32 ± 5.37 × 9.23 ± 1.74 μm, n = 28), obglobose to elongated, aseptate, pale brown to dark brown from immature to mature, slightly rough, guttulate, without a central scar.

      Culture characteristics – The colony surfaces are white, flat, spreading, floccose, with abundant aerial mycelia, colony margin entire and reverse white on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Yuxi City, Longma Mountain Scenic Area (24.418646 N, 102.606913 E, 2270 m), on diseased leaves of bamboo (Poaceae sp.), 12 May 2024, Q.Y. Liu (HSAUP 8305-4, holotype), ex-type culture CGMCC 3.29205 = SAUCC 8305-4; ibid., HSAUP 8305-1, living culture SAUCC 8305-1.

      Distribution – China, Yunnan Province.

      Ecology – Associated with diseased bamboo leaves (Poaceae sp.).

      Notes – Apiospora elongata (SAUCC 8305-4, ex-type) was found to be phylogenetically related to A. shangrilaensis (GMBCC1019, ex-type). Two species showed nucleotide differences in the ITS (18/548 bp), LSU (4/733 bp), tef1-α (12/417 bp), and tub2 (14/379 bp) gene regions. Morphologically, A. shangrilaensis has a confirmed sexual morph, but its asexual morph remains undetected[116]. Thus, we introduced A. elongata as a new species.

      Apiospora guangzhouensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 13

      Figure 13. 

      Apiospora guangzhouensis (CGMCC 3.29201, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, g, h) Conidiophores with conidiogenous cells and conidia. (f) Conidia masses developed from conidiogenous cells. (i) Conidiophores with conidia. j–k Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573285

      Etymology – The specific epithet is derived from the Guangzhou City, Guangdong Province, China, where the holotype was collected.

      On diseased bamboo leaves. Asexual morph: hyphae 1.67–3.43 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores 17.51–33.75 × 1.51–3.72 µm (av. = 26.68 ± 6.20 × 2.84 ± 0.6 μm, n = 17), hyaline, macronematous, branched, straight or flexuous, smooth and thin-walled, hyaline. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 4.80–12.72 × 2.20–3.86 µm (av. = 7.97 ± 2.72 × 2.74 ± 0.53 μm, n = 18), holoblastic, hyaline, cylindrical, straight, aseptate, smooth-walled. Conidia 5.41–10.94 × 3.47–6.71 μm (av. = 6.71 ± 1.29 × 5.41 ± 0.86 μm, n = 44), globose to cylindric-clavate, aseptate, dark brown, smooth to slightly rough, without the pale equatorial slit.

      Culture characteristics – The colony surfaces are pale brown, flat, spreading, filiform with thin aerial mycelium and reverse pale yellow on the PDA medium. The diameter of colony was 60 mm after culturing for 7 days at 25 °C.

      Material examined – China, Guangdong Province, Guangzhou City, Conghua District (19.005802 N, 109.825167 E, 392 m), on diseased bamboo leaves (Poaceae sp.), 1 March 2025, Q.Y. Liu (HSAUP 17273-3A, holotype), ex-type culture CGMCC 3.29201 = SAUCC 17273-3A; ibid., HSAUP 17273-3B, living culture SAUCC 17273-3B.

      Distribution – China, Guangdong Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Apiospora guangzhouensis belongs to the large clade, where it shows relationships with A. arundinis, A. guangdongensis, and A. senecionis. Apiospora guangzhouensis and A. arundinis (GUCC6.1) showed nucleotide differences in the ITS (4/469 bp), tef1-α (18/406 bp), and tub2 (8/341 bp) gene regions[63]. Apiospora guangzhouensis differs from A. guangdongensis (ZHKUCC 23-0004, ex-type) in its production of significant conidiophores (branched, 17.51–33.75 × 1.51–3.72 µm vs. unbranched, 45–53 × 2–4 µm) and nucleotide differences in the ITS (4/469 bp), tef1-α (20/406 bp), and tub2 (9/341 bp) gene regions[66]. Apiospora guangzhouensis is distinct from A. senecionis (HKAS 127245, ex-type) in producing narrower conidiogenous cells (2.20–3.86 vs. 6–7 μm), smaller conidia (dark brown, 5.41–10.94 × 3.47–6.71 μm vs. golden yellow to light brown from immature to mature, 8–17 μm diameter), and nucleotide differences in the ITS (1/539 bp), LSU (1/320 bp), and tub2 (28/796 bp) gene regions[61]. Thus, we described this fungus as a new species.

      Apiospora pseudosasae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 14

      Figure 14. 

      Apiospora pseudosasae (CGMCC 3.29202, ex-type culture). a Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, f) Conidia developed from conidiogenous cells. (g, h) Conidiophores with conidiogenous cells. (i–k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573287

      Etymology – The epithet "pseudosasae" refers to the host of the holotype, specifically Pseudosasa japonica.

      On diseased Pseudosasa japonica leaves. Asexual morph: hyphae 1.34–3.1 μm diameter, micronematous, hyaline, branched, thick-walled, septate or aseptate. Conidiophores 20.57–57.27 × 1.51–2.77 µm (av. = 37.04 ± 15.41 × 2.25 ± 0.62 μm, n =9), hyaline, straight or flexuous, smooth and thin-walled, hyaline. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 3.63–5.73 × 2.18–4.04 µm (av. = 4.67 ± 0.92 × 3.28 ± 0.61 μm, n = 11), holoblastic, hyaline, cylindrical, curved, aseptate, smooth-walled. Conidia 5.64–11.53 × 4.39–7.30 μm (av. = 6.88 ± 1.33 × 5.81 ± 0.73 μm, n = 28), globose to cylindric-clavate, aseptate, dark brown, smooth to slightly rough, guttulate, pale brown to dark brown from immature to mature with an equatorial germ slit.

      Culture characteristics – On the PDA, dense, entire margin, aerial mycelium white, crateriform, and reverse white. The diameter of colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.678618 N, 109.948190 E, 150.62 m), on diseased Pseudosasa japonica leaves (Poaceae sp.), 27 March 2024, Q.Y. Liu (HSAUP 7654-2, holotype), ex-type culture CGMCC 3.29202 = SAUCC 7654-2; ibid., on diseased leaves of bamboo (Poaceae sp.), 27 March 2024, Z.X. Dong, HSAUP 7743-2, living culture SAUCC 7743-2; ibid., Lingshui Li Autonomous County, Benhao Town (18.727155 N, 109.866009 E, 944 m), on diseased leaves of bamboo (Poaceae sp.), 09 April 2023, J. Zhang, HSAUP 3099A-4, living culture SAUCC 3099A-4; ibid., Diaoluoshan National Forest Park (18.678618 N, 109.948190 E, 150.62 m), on diseased leaves of bamboo (Poaceae sp.), 06 March 2025, Q.Y. Liu, HSAUP 16730-2, living culture SAUCC 16730-2.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Apiospora pseudosasae belongs to the large clade, where it shows a relationship with A. bambusicaulis, A. jinanensis, A. italica, and A. thailandica. Apiospora pseudosasae is distinct from A. bambusicaulis (GUCC17.41, ex-type) in producing longer conidiogenous cells (3.63–5.73 vs. 1.5–3.5 µm), having bigger conidia (5.64–11.53 × 4.39–7.30 vs. 4.5–6 × 5–6 µm), and in 57 nucleotide differences (8/499 bp in ITS, 1/766 bp in LSU, 21/422 bp in tef1-α, 27/391 bp in tub2)[63]. Apiospora pseudosasae differs from A. jinanensis (SAUCC DL1981, ex-type) in producing shorter and narrower conidiogenous cells (3.63–5.73 × 2.18–4.04 vs. 5.6–7.9 × 4.2–6.6 μm) and in 52 nucleotide differences (9/500 bp in ITS, 1/766 bp in LSU, 21/423 bp in tef1-α, 21/392 bp in tub2) in the gene regions[62]. Apiospora pseudosasae differs from A. italica (CBS 145138, ex-type) in its production of significantly larger conidia size (5.64–11.53 × 4.39–7.30 vs. 4–6 × 3–4 µm) and the presence of nucleotide differences (25/422 bp in tef1-α, 29/392 bp in tub2)[72]. Apiospora pseudosasae differs from A. thailandica (MFLUCC 15-0202, ex-type) in producing shorter and wider conidiogenous cells (3.63–5.73 × 2.18–4.04 vs. 11.5–39 × 2–3.5 μm) and in the presence of nucleotide differences (9/499 bp in ITS). Sequence data for tef1-α and tub2 genes were not available from strain MFLUCC 15-0202[81]. Thus, we described this fungus as a new species.

      Apiospora lingshuiensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 15

      Figure 15. 

      Apiospora lingshuiensis (CGMCC 3.29203, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, f, i, j) Conidia developed from conidiogenous cells. (g, h) Conidiophores and conidiogenous cells with conidia. (k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573289

      Etymology – "lingshuiensis" refers to the place Lingshui, from where the holotype was collected.

      On diseased leaves of bamboo. Asexual morph: hyphae 1.4–4.8 μm diameter, hyaline, branched, thick-walled, septate or aseptate, guttulate. Conidiophores 51.32–55.89 × 1.55–3.76 µm (av. = 53.60 ± 3.23 × 2.67 ± 1.57 μm, n = 12), hyaline, unbranched, straight or flexuous, smooth, aseptate, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 1.37–31.59 × 1.65–4.20 µm (av. = 7.69 ± 6.63 × 2.82 ± 0.71 μm, n = 22), holoblastic or polyblastic, hyaline, cylindrical or doliiform, straight or flexuous, aseptate, smooth-walled. Conidia 6.71–14.69 × 4.05–7.55 μm (av. = 8.52 ± 2.37 × 5.79 ± 1.04 μm, n = 21), obglobose to cylindric-clavate, aseptate, pale brown to dark brown from immature to mature, slightly rough, with a central scar.

      Culture characteristics – Colonies on PDA mycelium abundant, floccose, margin undulate, surface white and reverse white. The diameter of the colony was 70 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Lingshui Li Autonomous County, Diaoluoshan National Forest Park (18.7275498 N, 109.8640066 E, 972.81 m), on diseased leaves of bamboo (Poaceae sp.), 9 April 2023, X.Y. Liu (HSAUP 2919-2, holotype), ex-type culture CGMCC 3.29203 = SAUCC 2919-2; ibid., 27 March 2024, M.Y. Zhang, HSAUP 7580-2, living culture SAUCC 7580-2; ibid., 6 March 2024, Z.X. Dong, HSAUP 7733-3, living culture SAUCC 7733-3; ibid., Y.L. Wang, HSAUP 17373-3, living culture SAUCC 17373-3; ibid., Changjiang Li Autonomous County, Bawangling National Forest Park (19.0859333 N, 109.122752 E, 462.68 m), on diseased leaves of bamboo (Poaceae sp.), 14 October 2023, Q.Y. Liu, HSAUP 6569-5, living culture SAUCC 6569-5.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Apiospora lingshuiensis belongs to the large clade, where it shows a relationship with A. chromolaenae. Apiospora lingshuiensis differs from A. chromolaenae (MFLU 20-0300, ex-type) in its production of significant conidia (6.71–14.69 × 4.05–7.55 vs. 4–6 × 4.5–6.5 µm), conidiogenous cells (1.37–31.59 × 1.65–4.20 vs. 6.5–12 × 1–2 µm), and the presence of nucleotide differences (47/512 bp in ITS, 2/742 bp in LSU)[117]. Thus, we described A. lingshuiensis as a new species.

      Apiospora locuta-pollinis (F. Liu & L. Cai) Pintos & P. Alvarado, Fungal Systematics and Evolution 7: 207 (2021)

      Synonym. Apiospora fuxianhuensis H.W. Shen & Z.L. Luo

      Description. See Zhao et al.[75] and Shen et al.[80].

      Notes – Apiospora locuta-pollinis was first described from Hubei Province, China. The strain of this species was isolated from Brassica campestris[75]. Subsequently, A. fuxianhuensis was obtained from submerged decaying wood in Yunnan, China[80]. Notably, they exhibit only minor sequence and morphology variations. Apiospora fuxianhuensis is designated as a synonym of A. locuta-pollini.

      Apiospora multiplex Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 16

      Figure 16. 

      Apiospora multiplex (CGMCC 3.29210, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–g) Conidiogenous cells giving rise to conidia. (h) Conidia developed from conidiogenous cells. (i) Hyphae and conidia. (j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573290

      Etymology – The epithet "multiplex" refers to the host of the holotype, specifically Bambusa multiplex.

      On diseased leaves of Bambusa multiplex. On PDA. Asexual morph: hyphae 1.77–4.67 μm diameter, hyaline, branched or unbranched, thick-walled, septate. Conidiophores mononematous, unbranched, straight or flexuous, smooth and thin-walled, septate, hyaline, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 4.56–14.68 × 2.63–7.65 µm (av. = 9.90 ± 3.31 × 4.82 ± 1.53 μm, n = 19) from hyphae, holoblastic, hyaline, ampulliform or doliiform, straight, aseptate, smooth-walled. Conidia 5.17–9.09 × 4.08–6.59 μm (av. = 6.45 ± 0.87 × 5.28 ± 0.60 μm, n = 28), globose, subglobose to fusoid, aseptate, hyaline to dark brown from immature to mature, smooth to slightly rough, guttulate with a pale equatorial slit.

      Culture characteristics – The colony surfaces are white, convex center and flat margins, floccose with abundant aerial mycelia, and reverse white on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Ledong Li Autonomous County, Jianfengling National Forest Park (18.700142 N, 108.812270 E, 127 m), on diseased Bambusa multiplex leaves (Poaceae sp.), 4 December 2024, Q.Y. Liu (HSAUP 14451-1A, holotype), ex-type culture CGMCC 3.29210 = SAUCC 14451-1A; ibid., HSAUP 14451-1B, living culture SAUCC 14451-1B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Bambusa multiplex (Poaceae sp.).

      Notes – Apiospora multiplex belongs to the large clade, where it shows a relationship with A. guizhouensis. Two species showed nucleotide differences in the ITS (1/518 bp), tef1-α (6/341 bp), and tub2 (10/368 bp) gene regions. Morphologically, our isolates differ significantly from the ex-type strain of A. guizhouensis (LC5322, ex-type) in possessing larger conidiogenous cells (4.56–14.68 × 2.63–7.65 vs. 3.5–8.0 × 3.0–4.5 µm)[68]. Arthrinium guizhouense was originally identified from the air in karst cave in Guizhou Province[68]. It was subsequently synonymized under A. guizhouensis based on phylogenetic evidence[25]. Thus, we described A. multiplex as a new species.

      Apiospora pingtangensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 17

      Figure 17. 

      Apiospora pingtangensis (CGMCC 3.29217, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidiophores and conidiogenous cells giving rise to conidia. (i) Conidia developed from conidiogenous cells. (j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573292

      Etymology – The epithet "pingtangensis" refers to the location where the type was collected, Pingtang County.

      On PDA. Asexual morph: hyphae 1.94–4.22 μm diameter, hyaline, branched, thick-walled, septate. Conidiophores 30.18–33.46 × 3.19–4.54 µm (av. = 31.82 ± 2.32 × 3.87 ± 0.95 μm, n = 3), hyaline, smooth, septate or aseptate, guttulate. Conidiogenous cells 3.13–13.13 × 2.24–3.81 µm (av. = 7.32 ± 3.39 × 2.95 ± 0.60 μm, n = 16), aggregated on hyphae or from conidiophores, holoblastic, hyaline, cylindrical, straight, aseptate, smooth-walled. Conidia 7.50–12.74 × 6.23–9.01 μm (av. = 8.86 ± 1.42 × 7.64 ± 0.66 μm, n = 30), globose to oblong elliptical, aseptate, pale brown to brown from immature to mature, smooth with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium abundant, floccose, margin entire, surface white and reverse white to pale brown. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Guizhou Province, Qiannan Buyi and Miao Autonomous Prefecture, Pingtang County, Kapu Maonan Town (25.79510 N, 107.38631 E, 745 m), on diseased leaves of bamboo (Poaceae sp.), 23 August 2023, D.H. Li (HSAUP 5602-1A, holotype), ex-type culture CGMCC 3.29217 = SAUCC 5602-1A; ibid., HSAUP 5602-1B, living culture SAUCC 5602-1B.

      Distribution – China, Guizhou Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Apiospora pingtangensis belongs to the large clade, where it shows a relationship with A. cyclobalanopsidis. Apiospora pingtangensis differs from A. cyclobalanopsidis (CGMCC 3.20136, ex-type) in its production of significant conidia (7.50–12.74 × 6.23–9.01 vs. 8–12 µm, 10–14 µm) and conidiogenous cells (3.13–13.13 × 2.24–3.81 vs. 6.0–19.0 × 2.5–7.0 µm) and the presence of 21 distinct nucleotide positions (12/412 bp in tef1-α, 9/392 bp in tub2)[69]. Arthrinium cyclobalanopsidis was originally identified from Cyclobalanopsidis glauca in Guizhou Province, China[69]. Subsequently, it was synonymized under A. cyclobalanopsidis after a phylogenetic analysis[64]. Thus, Apiospora pingtangensis was described as a new species.

      Apiospora qiongzhongensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 18

      Figure 18. 

      Apiospora qiongzhongensis (CGMCC 3.29226, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; (b) top view and (c) bottom view. (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573293

      Etymology – The epithet "qiongzhongensis" refers to the location where the type was collected, Qiongzhong County.

      Asexual morph: On PDA, hyphae 2.4–5.9 μm diameter, micronematous, hyaline, smooth, branched, thick-walled, guttulate. Conidiophores are occasionally reduced to conidiogenous cells. Conidiogenous cells 10.00–12.81 × 2.21–3.81 μm (av. = 11.52 ± 1.16 × 2.81 ± 0.62 μm), arising from hyphae, hyaline, cylindrical, straight or slightly flexuous, guttulate. Conidia 6.51–9.94 × 5.39–6.99 µm (av. = 7.81 ± 1.12 × 6.36 ± 0.54 μm, n = 24), smooth, pale brown to tanned, subglobose, ellipsoidal, aseptate, guttulate, smooth to slightly rough, with a thin germ slit.

      Culture characteristics – The colony surfaces are white, flat, cottony, spreading, with filamentous margin, reverse similar in colour on the PDA medium. The diameter colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Qiongzhong Li and Miao Autonomous County, Baihualing Tropical Rainforest Tourism and Culture Zone (19.005802 N, 109.825167 E, 392 m), on diseased bamboo leaves (Poaceae sp.), 3 December 2024, Q.Y. Liu (HSAUP 14296-1A, holotype), ex-type culture CGMCC 3.29226 = SAUCC 14296-1A; ibid., HSAUP 14296-1B, living culture SAUCC 14296-1B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Based on phylogenetic analysis, the two isolates of the new species A. qiongzhongensis form an independent phylogenetic clade, which is closely related to A. piptatheri. Apiospora qiongzhongensis (SAUCC 14296-1A, ex-type) and A. piptatheri (CBS 145149, ex-type) showed nucleotide differences in the ITS (3/520 bp) and LSU (7/788 bp) gene regions. Morphologically, A. qiongzhongensis differs significantly from A. piptatheri in having shorter conidiogenous cells (10.00–12.81 × 2.21–3.81 vs. 6–27 × 2–5 µm) and bigger conidia (6.51–9.94 × 5.39–6.99 vs. 6–8 × 3–5 µm). No sterile cells were observed in A. qiongzhongensis. Arthrinium piptatheri was originally identified from Piptatherum miliaceum in Spain[72]. It was subsequently synonymized under A. piptatheri based on phylogenetic evidence[25]. Thus, we described A. qiongzhongensis as a new species. For details, see Supplementary Information 11.

      Apiospora renhuaensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 19

      Figure 19. 

      Apiospora renhuaensis (CGMCC 3.29221, ex-type culture). (a, b) Colonies after incubation on PDA for 7 days; (a) top view and (b) bottom view. (c) Conidiomata formed in culture. (d–g) Conidiogenous cells with conidia and sterile cells. (h, i) Conidia. (j, k) Sterile cells. Scale bars: 10 μm (d–k).

      Fungal names: FN 573294

      Etymology – The epithet "renhuaensis" refers to the location where the type was collected, Renhua County.

      On diseased leaves of bamboo. Asexual morph: hyphae 1.7–4.2 μm diameter, hyaline to pale brown, branched, thick-walled, septate. Conidiophores cylindrical, aseptate, flexuous, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 13.3–37.3 × 3.7–6.5 µm (av. = 21.7 ± 7.5 × 4.7 ± 0.9 μm, n = 20), holoblastic, hyaline to pale brown, cylindrical, straight, aseptate, smooth-walled. Conidia 18.4–30.6 × 15.5–25.9 μm diameter (av. = 25.3 ± 3.4 × 22.0 ± 3.1 μm, n = 16), globose to subglobose, aseptate, smooth, pale brown to dark brown from immature to mature, without the pale equatorial slit. Sterile cells pale brown, elongated ellipsoidal, 18–32 × 15–22 μm.

      Culture characteristics – The colony surfaces are cream-colored, flat, floccose, aerial mycelia scant and reverse pale yellow on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Guangdong Province, Shaoguan City, Renhua County (25.087103 N, 113.743706 E, 106.2 m), on diseased bamboo leaves (Poaceae sp.), 11 April 2023, Y.L. Wang (HSAUP 17293-1A, holotype), ex-type culture CGMCC 3.29221 = SAUCC 17293-1A; ibid., HSAUP 17293-1B, living culture SAUCC 17293-1B.

      Distribution – China, Guangdong Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Two isolates of the new species A. renhuaensis form an independent clade based on phylogenetic analysis, which is closely related to A. anshunensis. The two species showed nucleotide differences in the ITS (13/528 bp), LSU (2/760 bp), and tub2 (18/384 bp) gene regions. Morphologically, A. renhuaensis differs significantly from A. anshunensis in its possession of sterile cells[118]. Thus, we described A. renhuaensis as a new species.

      Apiospora rutila Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 20

      Figure 20. 

      Apiospora rutila (CGMCC 3.29223, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidiophore with conidium. (i, j) Conidia developed from conidiogenous cells. (k, l) Conidia. Scale bars: 10 μm (e–l).

      Fungal names: FN 573295

      Etymology – The epithet "rutila" refers to the host of the holotype, specifically Bambusa rutila.

      On diseased leaves of Bambusa rutila. Asexual morph: hyphae 1.3–2.6 μm diameter, micronematous, hyaline to pale brown, branched, thick-walled, septate or aseptate. Conidiophores 20.57–57.27 × 1.51–2.77 µm (av. = 37.04 ± 15.41 × 2.25 ± 0.62 μm, n =9), hyaline, straight or flexuous, septate, smooth and thin-walled, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 4.39–13.76 × 2.37–7.43 µm (av. = 11.05 ± 3.77 × 3.64 ± 2.13 μm, n = 17), arising from hyphae, holoblastic, hyaline, cylindrical, curved, septate or aseptate, smooth-walled. Conidia 10.53–19.52 × 9.29–14.20 µm (av. = 14.63 ± 2.61 × 10.89 ± 1.41 μm, n = 16), globose to ellipsoidal, aseptate, hyaline to dark brown from immature to mature, smooth, guttulate.

      Culture characteristics – The colony is dense, with an undulate and irregular margin, a surface featuring patches of white aerial mycelia, and a cream-colored reverse on the PDA medium. The diameter of the colony was 76.8–86.6 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.678618 N, 109.948190 E, 150.62 m), on diseased Bambusa rutila leaves (Poaceae sp.), 12 March 2024, Q.Y. Liu (HSAUP 7656-5A, holotype), ex-type culture CGMCC 3.29223 = SAUCC 7656-5A; ibid., HSAUP 7656-5B, living culture SAUCC 7656-5B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Bambusa rutila leaves (Poaceae sp.).

      Notes – Apiospora rutila was described from the leaves of Bambusa rutila in China. The new species formed an independent clade that differed from A. ovata and A. campsidis in the phylogenetic analysis. Apiospora rutila and A. ovata (CBS 115042, ex-type) showed nucleotide differences in the ITS (37/501 bp), tef1-α (55/428 bp), and tub2 (44/400 bp) gene regions. Apiospora rutila and A. campsidis (CBS 11198-2A, ex-type) showed nucleotide differences in the ITS (35/501 bp), tef1-α (51/428 bp), and tub2 (41/400 bp) gene regions. In morphology, A. ovata has numerous sterile cells, whereas no sterile cells have been observed in A. rutile[22]. The conidiophores of A. rutila are longer than those of A. campsidis (20.57–57.27 × 1.51–2.77 vs. 13.98–39.36 × 2.37–4.50 µm). Thus, we described A. rutila as a new species.

      Apiospora shaoguanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 21

      Figure 21. 

      Apiospora shaoguanensis (CGMCC 3.29220, ex-type culture). (a, b) Colonies after incubation on PDA for 7 days; top view (a) and bottom view (b). (c) Conidiomata formed in culture. (d) Conidiophores and conidiogenous cells giving rise to conidia. (e, f) Conidia developed from conidiogenous cells. (g, h) Conidia. Scale bars: 10 μm (d–h).

      Fungal names: FN 573297

      Etymology – The epithet "shaoguanensis" refers to the holotype collected from the shaoguan city, Guangdong Province.

      On diseased bamboo leaves. Asexual morph: hyphae 1.3–4.9 μm diameter, hyaline to pale brown, branched, thick-walled, septate. Conidiophores 66.7–138.6 × 2.26–4.88 µm (av. = 94.14 ± 38.9 × 3.44 ± 1.32 μm, n = 7), hyaline, flexuous, aseptate, thin-walled, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 3.34–9.57 × 1.99–4.45 µm (av. = 7.01 ± 2.13 × 3.32 ± 0.93 μm, n = 16), holoblastic or polyblastic, hyaline to pale brown, cylindrical, straight, smooth-walled. Conidia 7.06–9.84 × 6.17–8.25 µm (av. = 7.96 ± 0.59 × 7.36 ± 0.53 μm, n = 23), globose to ellipsoidal, aseptate, dark brown, smooth, guttulate with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium abundant, margin entire, surface and reverse white. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Guangdong Province, Shaoguan City, Danxia Mountain (25.004042 N, 113.676879 E, 90 m), on diseased leaves of bamboo leaves (Poaceae sp.), 3 March 2025, Y.L. Wang (HSAUP 17341-2A, holotype), ex-type culture CGMCC 3.29220 = SAUCC 17341-2A; ibid., HSAUP 17341-2B, living culture SAUCC 17341-2B.

      Distribution – China, Guangdong Province.

      Ecology – Associated with diseased leaves of Bambusa rutila (Poaceae sp.).

      Notes – Apiospora shaoguanensis (SAUCC 17341-2A, ex-type) was found to be phylogenetically related to A. wuyishanensis (SAUCC 11013-4A, ex-type). The two species showed nucleotide differences in the ITS (1/498 bp), tef1-α (24/409 bp), and tub2 (16/391 bp) gene regions. Morphologically, A. shaoguanensis differs significantly from A. wuyishanensis (SAUCC 11013-4A, ex-type) in having longer conidiophores (94.14 × 3.44 vs. 23.1 × 2.58 µm) and smaller conidiogenous cells (3.34–9.57 × 1.99–4.45 vs. 5.71–17.15 × 3.71–5.38 µm). Thus, we described A. shaoguanensis as a new species.

      Apiospora taianensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 22

      Figure 22. 

      Apiospora taianensis (CGMCC 3.29370, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; (b) top view and (c) bottom view. (d) Conidiomata formed in culture. (e, f, h) Conidia developed from conidiogenous cells. (g) Conidia produced from conidiophores and conidiogenous cells. (i) Conidia. (j) Conidia, conidia masses, sterile cells and hyphae. Scale bars: 10 μm (e–j).

      Fungal names: FN 573298

      Etymology – The epithet "taianensis" refers to the location where the type was collected: Tai’an City, Shandong Province.

      On diseased bamboo leaves. Asexual morph: hyphae 1.8–6.7 μm diameter, hyaline to pale brown, branched, thick-walled, septate, guttulate. Conidiophores 34.26–88.94 × 2.14–3.26 µm (av. = 67.05 ± 26.01 × 2.75 ± 0.46 μm, n = 14), hyaline, unbranched, straight or flexuous, smooth, aseptate, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 6.4–20.1 × 3.0–5.0 µm (av. = 15.1 ± 5.5 × 3.8 ± 0.9 μm, n = 18), holoblastic or polyblastic, hyaline, cylindrical, straight, aseptate, smooth-walled. Conidia 8.4–25.4 × 3.4–9.6 μm (av. = 14.0 ± 5.0 × 7.6 ± 1.5 μm, n = 27), subglobose to cylindric-clavate, aseptate, smooth, dark brown without the pale equatorial slit. Sterile cells are crescent-shaped.

      Culture characteristics – The colony surfaces are flat, floccose, with moderate aerial mycelia, surfaces and reverse white on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Shandong Province, Tai’an City, Tianwaicun, Longtan Park (36.196715 N, 117.115043 E, 159.6 m), on diseased bamboo leaves (Poaceae sp.), 19 October 2024, Q.Y. Liu (HSAUP 10745-3A, holotype), ex-type culture CGMCC 3.29370 = SAUCC 10745-3A; ibid., HSAUP 10745-3B, living culture SAUCC 10745-3B.

      Distribution – China, Shandong Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Based on phylogenetic analyses, the two isolates of the new species Apiospora taianensis form an independent clade, which is closely related to A. dongyingensis and A. camelliae-sinensis. Apiospora taianensis and A. dongyingensis (SAUCC 0302, ex-type) show nucleotide differences in the ITS (12/499 bp), LSU (1/751 bp), tef1-α (9/414 bp), and tub2 (12/388 bp) gene regions. Morphologically, A. taianensis differs significantly from A. dongyingensis in having longer conidiogenous cells (6.4–20.1 × 3.0–5.0 vs. 8.2–13.9 × 4.2–8.2 μm) and bigger conidia (8.4–25.4 × 3.4–9.6 vs. 8.0–16.5 × 5.5–9.0 μm)[29]. Apiospora taianensis and A. camelliae-sinensis (LC5007, ex-type) showed nucleotide differences of 1/499 bp, 1/751 bp, 4/414 bp, and 12/388 bp across four gene regions (ITS, LSU, tef1-α, and tub2, respectively). Morphologically, A. taianensis differs significantly from A. camelliae-sinensis in having longer conidiogenous cells (6.4–20.1 × 3.0–5.0 vs. 4.0–9.5 × 3.0–6.0 µm) and bigger conidia (8.4–25.4 × 3.4–9.6 vs. 9.0–13.5 × 7.0–12.0 µm)[68]. Arthrinium camelliae-sinensis was originally identified from Camellia sinensis in Jiangxi Province, China[68]. It was subsequently synonymized under A. camelliae-sinensis based on phylogenetic evidence[25]. Thus, we described A. taianensis as a new species.

      Apiospora teapae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 23

      Figure 23. 

      Apiospora teapae (CGMCC 3.29228, ex-type culture). (a, b) Colonies after incubation on PDA for 7 days; (a) top view and (b) bottom view. (c) Conidiomata formed in culture. (d, e) Conidia developed from conidiophores. (f, g) Conidia developed from conidiogenous cells. (h, i) Conidia. Scale bars: 10 μm (d–i).

      Fungal names: FN 573299

      Etymology – The epithet "teapae" refers to the host of the holotype, specifically tea leaves.

      On PDA. Asexual morph: hyphae 1.22–3.58 μm diameter, hyaline, branched, thick-walled, septate, guttulate. Conidiophores 35.38–60.66 × 1.65–3.39 µm (av. = 46.94 ± 9.78 × 2.28 ± 0.69 μm, n =15), hyaline, straight or flexuous, smooth and thin-walled, hyaline, septate, unbranched, guttulate, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 8.00–19.19 × 1.96–4.25 µm (av. = 12.01 ± 3.85 × 3.23 ± 0.74 μm, n = 18) from hyphae, holoblastic or polyblastic, hyaline, cylindrical or ampulliform, straight or flexuous, aseptate, smooth-walled, guttulate. Conidia 6.74–10.46 × 6.00–8.14 μm (av. = 8.21 ± 0.93 × 6.92 ± 0.63 μm, n = 19), globose to ellipsoidal, aseptate, pale brown to dark brown, smooth to slightly rough, guttulate.

      Culture characteristics – The colony surfaces are pale orange, raised in the center and flat around the edges, filiform, with abundant aerial mycelia, colony margin undulate and reverse orange on the PDA medium. The diameter of the colony was 71.71–75.00 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Meng Hai County, Meng Hai Town (21.991154 N, 100.489806 E, 1146 m), on tea leaves, 11 July 2024, Q.Y. Liu (HSAUP 9814-1, holotype), ex-type culture CGMCC 3.29228 = SAUCC 9814-1; ibid., HSAUP 9814-2, living culture SAUCC 9814-2.

      Distribution – China, Yunnan Province.

      Ecology – Associated with tea leaves.

      Notes – Apiospora saprophytica belongs to the large clade, where it shows a relationship with A. xishuangbannaensis. The two species showed nucleotide differences in the ITS (8/518 bp), tef1-α (9/414 bp), and tub2 (8/387 bp) gene regions. Morphologically, our isolates differ significantly from A. xishuangbannaensis (KUMCC 21-0695, ex-type) in possessing shorter conidiogenous cells (8.00–19.19 × 1.96–4.25 vs. 6–37 × 1–5 μm) and narrower hyphae (1.22–3.58 vs. 1–6 μm)[119]. Thus, we described A. teapae as a new species.

      Apiospora ventricosa Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 24

      Figure 24. 

      Apiospora ventricosa (CGMCC 3.29215, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days from above (b) and below (c). (d) Conidiomata formed in culture. (e, f) Conidia developed from conidiophores and conidiogenous cells. (g, h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573300

      Etymology – The epithet "ventricosa" refers to the host of the holotype, specifically Bambusa ventricosa.

      On PDA. Asexual morph: hyphae 2.12–5.38 μm diameter, hyaline to pale yellow, branched, thick-walled, septate. Conidiophores 7.39–26.35 × 1.85–3.20 µm (av. = 17.69 ± 8.00 × 2.57 ± 0.50 μm, n = 18), hyaline to pale yellow, branched or unbranched, straight or flexuous, smooth to pale verrucose, septate. Conidiogenous cells 2.65–5.06 × 2.55–3.61 µm (av. = 3.78 ± 0.93 × 3.03 ± 0.44 μm, n = 16), holoblastic or polyblastic, hyaline to pale yellow, cylindrical, straight, aseptate, smooth-walled. Conidia 4.69–7.59 × 3.76–6.79 μm (av. = 5.86 ± 0.69 × 5.20 ± 0.71 μm, n = 30), globose to subglobose, aseptate, dark brown, smooth to slightly rough, guttulate, with a pale equatorial slit.

      Culture characteristics – The colony surfaces are pale yellow, flat, floccose, with abundant aerial mycelia, colony margin entire and reverse pale yellow on the PDA medium. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Qiongzhong Li and Miao Autonomous County, Baihualing Tropical Rainforest Tourism and Cultural Zone (19.005802 N, 109.825167 E, 392 m), on diseased leaves of Bambusa ventricosa, 3 December 2024, Q.Y. Liu (HSAUP 14311-2A, holotype), ex-type culture CGMCC 3.29215 = SAUCC 14311-2A; ibid., HSAUP 14311-2B, living culture SAUCC 14311-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Bambusa ventricosa.

      Notes –See the notes of Apiospora changjiangensis.

      Apiospora wuyishanensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 25

      Figure 25. 

      Apiospora wuyishanensis (CGMCC 3.29230, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, g) Conidia developed from conidiogenous cells. (f) Conidia developed from conidiophores and conidiogenous cells. (h, i) Conidia. Scale bars: 10 μm (e–i).

      Fungal names: FN 573301

      Etymology – The epithet "wuyishanensis" refers to the holotype was collected from the wuyishan city, Fujian Province.

      On diseased bamboo leaves. On WA. Asexual morph: hyphae 2.0–5.0 μm diameter, hyaline to pale brown, branched, thick-walled, septate. Conidiophores 21.1–26.5 × 2.1–2.9 µm (av. = 23.1 ± 3.0 × 2.58 ± 0.43 μm, n = 5), pale brown, flexuous, septate, thin-walled, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 5.71–17.15 × 3.71–5.38 µm (av. = 9.22 ± 4.55 × 4.43 ± 0.62 μm, n = 5), holoblastic or polyblastic, brown, cylindrical or ampulliform, straight, smooth-walled. Conidia 8.32–10.75 × 6.17–10.13 µm (av. = 9.44 ± 0.62 × 7.97 ± 1.07 μm, n = 28), globose to ellipsoidal, aseptate, dark brown, smooth, guttulate with a pale equatorial slit.

      Culture characteristics – Colonies on PDA mycelium abundant, margin entire, surface white, reverse pale yellow. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Fujian Province, Wuyishan City (27.644737 N, 117.883815 E, 239.5 m), on diseased bamboo leaves (Poaceae sp.), 20 October 2024, Q.Y. Liu (HSAUP 11013-4A, holotype), ex-type culture CGMCC 3.29230 = SAUCC 11013-4A; ibid., HSAUP 11013-4B, living culture SAUCC 11013-4B.

      Distribution – China, Fujian Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – See the notes of Apiospora shaoguanensis.

      Apiospora zingiberis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 26

      Figure 26. 

      Apiospora zingiberis (CGMCC 3.29227, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i) Conidia developed from conidiophores and conidiogenous cells. (j, k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573302

      Etymology – The epithet "zingiberis" refers to the host of the holotype, specifically Zingiber zerumbet.

      On diseased leaves of Zingiber zerumbet. Asexual morph: hyphae 1.73–5.17 μm diameter, hyaline, branched, thick-walled, septate. Conidiophores 60.62–64.62 × 1.87–2.57 µm (av. = 62.62 ± 2.82 × 2.22 ± 0.49 μm, n = 2), hyaline, branched, straight or flexuous, smooth and thin-walled, hyaline, and are occasionally reduced to conidiogenous cells. Conidiogenous cells 8.41–41.30 × 1.64–4.30 µm (av. = 21.17 ± 10.71 × 2.86 ± 0.81 μm, n = 19), holoblastic, hyaline, cylindrical, straight or flexuous, aseptate or septate, smooth-walled. Conidia 10.32–18.44 × 9.41–15.88 μm (av. = 14.62 ± 2.16 × 12.95 ± 1.96 μm, n = 23), globose to cylindric-clavate, aseptate, hyaline, transitioning to pale brown and becoming dark brown when fully mature, smooth to slightly rough without a central scar.

      Culture characteristics – The colony surfaces are white, medially raised, becoming thinner toward the edge, filiform, with abundant aerial mycelia and reverse yellowish white on the PDA medium. The diameter of the colony was 84.35–87.15 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Jinghong City, Xishuangbanna Primitive Forest Park (22.0312884 N, 100.8769031 E, 678 m), on diseased Zingiber zerumbet leaves, 17 March 2023, D.H. Li (HSAUP 2058-1A, holotype), ex-type culture CGMCC 3.29227 = SAUCC 2058-1A; ibid., HSAUP 2058-1B, living culture SAUCC 2058-1B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with diseased leaves of Zingiber zerumbet.

      Notes – Apiospora zingiberis belongs to the large clade, where it shows a relationship with A. bambusigena, A. cordylines, A. danzhouensis, A. dematiacea, A. endophytica, and A. hydei. Apiospora zingiberis is distinct from A. bambusigena (SAUCC 2446-2, ex-type) in producing longer conidiophores (60.62–64.62 × 1.87–2.57 vs. 7.8–18.8 × 3.7–4.6 μm) and longer conidiogenous cells (8.41–41.30 × 1.64–4.30 vs. 5.2–8.8 × 3.0–4.6 μm), and showed nucleotide differences in the tef1-α (27/326 bp) and tub2 (8/796 bp)[120]. Apiospora zingiberis differs from A. cordylines (GUCC10027, ex-type) in its production of significantly wider hyphae (1.73–5.17 vs. 1.5–2.5 µm), longer conidiogenous cells (8.41–41.30 × 1.64–4.30 vs. (3–)5–10(–15) × 2.6–5.3 µm), and nucleotide differences in the tef1-α (19/409 bp) and tub2 (9/379 bp)[76]. Apiospora zingiberis differs from A. danzhouensis (SAUCC 6688-4, ex-type) in its production of significantly longer conidiogenous cells (8.41–41.30 × 1.64–4.30 vs. 6.31–23.81 × 1.16–4.07 µm), and nucleotide differences in the tef1-α (23/401 bp) and tub2 (8/379 bp). Apiospora zingiberis is distinguished from A. dematiacea (HKAS 129910, ex-type) by its conidial morphology and sequence divergence. The conidia of A. zingiberis (globose to cylindric-clavate, 10.32–18.44 × 9.41–15.88 μm) differ from those of A. dematiacea based on the globose to ellipsoid structure with longitudinal striations in surface view (14.5–18(–20) µm) and lenticular to lageniform in side view (18.5–23(–25) × 10–13 µm), and showed nucleotide differences in the tef1-α (29/407 bp) and tub2 (9/379 bp)[65]. Apiospora zingiberis differs from A. endophytica (ZHKUCC 23-0006, ex-type) in its production of significant conidiophore cells (8.41–41.30 × 1.64–4.30 vs. 4–14 × 2–7 µm) and in its conidia not having a thick equatorial slit, with 32 nucleotide differences in tef1-α and tub2 (23/402 bp in tef1-α, 9/379 bp in tub2)[66]. Apiospora zingiberis differs from A. hydei (CBS 114990, ex-type) in its production of significantly longer conidiophores (60.62–64.62 × 1.87–2.57 vs. 20–40 × 3–5 µm) and longer conidiogenous cells (8.41–41.30 × 1.64–4.30 vs. 5–8 × 4–5 μm), its conidia lacking a distinct equatorial germ slit, and in having 31 nucleotide differences in the tef1-α and tub2 loci (21/402 bp in tef1-α; 10/379 bp in tub2)[22]. Thus, we introduced A. zingiberis as a novel species.

      Nigrospora Zimm.

      Notes – Nigrospora was proposed by Zimmerman[121] with the type species Nigrospora panici. Nigrospora produces an asexual morph with branched, micronematous to semimacronematous conidiophores and monoblastic conidiogenous cells that bear black, shiny, aseptate conidia. It also forms a sexual morph consisting of perithecial ascomata with short-stalked, biseriate asci[82,87,107].

      In the phylogenetic tree comprising 126 Nigrospora isolates, the strain of Apiospora pseudoparenchymatica (LC7234) was classified as the outgroup. The alignment sequences contain 1,642 concatenated characters, viz. 1–547 (ITS), 548–1,094 (tef1-α), and 1,095–1,642 (tub2). Among these sequences, 1,013 characters were constant, 79 characters were variable and parsimony-uninformative, and 550 characters were parsimony-informative. The topologies were consistent from the ML and BI analyses; thus, the ML tree is reported in this study. All the tested 125 strains were identified to belong to 49 species upon analysis of ITS, tef-1α, and tub2 gene sequences. BI analysis was performed over 2,555,000 generations in 5,112 trees; 3/4 of the trees were utilized to compute the posterior probability using the majority-rule consensus tree method (Fig. 27; first value: BIPP ≥ 0.90 displayed).

      Figure 27. 

      Phylogenetic tree of the genus Nigrospora based on a concatenated ITS, tef1-α, and tub2 sequences alignment, with Apiospora pseudoparenchymatica serving as the outgroup. The Bayesian inference posterior probability (right, BIPP ≥ 0.90) and the maximum likelihood bootstrap value (left, MLBV ≥ 75%) are shown as MLBV/BIPP above the nodes. Strains marked "*" in the tree are ex-type or ex-epitype. Strains isolated are highlighted in red. The scale bar at the bottom indicates 0.1 substitutions per site. To enhance the visual appeal of the evolutionary tree layout, certain branches are shortened by two diagonal lines ( "//" ) with the number of times.

      Nigrospora buddlejae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 28

      Figure 28. 

      Nigrospora buddlejae (CGMCC 3.29368, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–g) Conidia developed from conidiogenous cells. (h, i) Conidia. Scale bars: 10 μm (e–i).

      Fungal names: FN 573264

      Etymology – The epithet "buddlejae" refers to the host of the holotype, specifically Buddleja davidii.

      Asexual morph: hyphae smooth, pale brown, branched, septate, 2.6–5.3 μm diameter. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells arising from hyphae, pale brown, subcylindrical, 7.82–10.22 × 5.45–9.27 μm (av. = 8.88 ± 0.96 × 6.84 ± 1.48, n = 15). Conidia solitary, elliptical or subglobose, black, shiny, smooth, aseptate, 16.61–22.24 × 15.14–17.67 μm (av. = 18.48 ± 1.69 × 16.38 ± 0.91, n = 21).

      Culture characteristics – On the PDA medium, dense, entire margin, aerial mycelium black, and reverse brow. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Wuzhishan City, Shuiman Township (18.907031 N, 109.672299 E, 716 m), on diseased leaves of Buddleja davidii, 10 April 2024, J. Zhang (HSAUP 3199-2A, holotype), ex-type culture CGMCC 3.29368 = SAUCC 3199-2A; ibid., HSAUP 3199-2B, living culture 3199-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Buddleja davidii.

      Notes – The strains of Nigrospora buddlejae are closed to Nig. mercuriadeae (ex-type BRIP 75764a; ITS: 35/451 bp, tef1-α: 41/258 bp, tub2: 43/346 bp) and Nig. yunnanensis (ex-type GUCC24-0008; ITS: 32/454 bp, tef1-α: 90/444 bp, tub2: 29/296). Morphologically, Nig. buddlejae can be differentiated from Nig. yunnanensis by its bigger conidia (16.61–22.24 × 15.14–17.67 vs. 14.5–18.5 × 11–17.5 µm)[122]. Nigrospora mercuriadeae (BRIP 75764a, ex-type) was isolated from Chromolaena odorata in Australia, but its morphology was not described[123]. Thus, we described Nig. buddlejae as a new species.

      Nigrospora helwingiae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 29

      Figure 29. 

      Nigrospora helwingiae (CGMCC 3.29236, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i) Conidia. (j) Hyphae. Scale bars: 10 μm (e–j).

      Fungal names: FN 573265

      Etymology – The epithet "helwingiae" refers to the host of the holotype, specifically Helwingia japonica.

      Asexual morph: hyphae dense, guttulate, verrucose, hyaline to pale brown, branched, septate, 2.4–10.2 μm diameter. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells pale brown, cylindrical, 12.92–27.56 × 3.21–10.63 μm (av. = 19.92 ± 8.07 × 6.78 ± 3.04, n = 4). Conidia solitary, elliptical or subglobose, pale brown to brown, shiny, slightly guttulate, aseptate, 9.03–18.78 × 8.88–14.19 μm (av. = 14.66 ± 2.49 × 12.17 ± 1.74, n = 21).

      Culture characteristics – On the PDA medium, dense, entire margin. Both the surface and reverse of the aerial mycelium exhibit a brown center and a white periphery, crateriform. The diameter of the colony was 62.76 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Jinghong City, Xishuangbanna Primitive Forest Park (22.0312884 N, 100.8769031 E, 678 m), on leaves of Helwingia japonica, 17 March 2023, D.H. Li (HSAUP 2034-2A, holotype), ex-type culture CGMCC 3.29236 = SAUCC 2034-2A; ibid., HSAUP 2034-2B, living culture 2034-2B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with leaves of Helwingia japonica.

      Notes – Two strains representing Nig. helwingiae clustered in a well-supported clade and closely to Nig. globospora (CGMCC 3.20539, ex-type) (15/427 in tef1-α). Morphologically, Nig. helwingiae can be differentiated from Nig. globospora by its larger conidiogenous cells (12.92–27.56 × 3.21–10.63 vs. 8.5–9 × 3–4.5 μm) and bigger conidia (9.03–18.78 × 8.88–14.19 vs. 8.5–12 × 10.5–13.5 µm)[124]. Thus, we described Nig. helwingiae as a new species.

      Nigrospora officinalis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 30

      Figure 30. 

      Nigrospora officinalis (CGMCC 3.29239, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–g) Conidia developed from conidiogenous cells. (h, i) Conidia. Scale bars: 10 μm (e–i).

      Fungal names: FN 573266

      Etymology – The epithet "officinalis" refers to the host of the holotype, specifically Jasminum officinale.

      Asexual morph: hyphae smooth, pale brown, branched, septate, 2.0–3.8 μm diam. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells arise from hyphae, and are pale brown, ellipsoidal, clavate to cylindrical, 6.48–11.48 × 5.46–6.51 μm (av. = 8.50 ± 1.88 × 6.00 ± 0.45, n = 18). Conidia globose or elliptical, pale brown to brown, shiny, slightly guttulate, aseptate, 13.32–17.40 × 10.37–15. 64 μm (av. = 15.36 ± 1.33 × 13.25 ± 1.76, n = 19).

      Culture characteristics – On the PDA medium, dense, colony margin undulate, aerial mycelium white to pale brown, crateriform, and reverse pale yellow. The diameter of the colony was 83 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Changjiang Li Autonomous County, Bawangling National Forest Park (19.0859333 N, 109.122752 E, 462 m), on diseased leaves of Jasminum officinale, 14 October 2023, W.W. Liu (HSAUP 6476-5A, holotype), ex-type culture CGMCC 3.29239 = SAUCC 6476-5A; ibid., HSAUP 6476-5B, living culture 6476-5B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Jasminum officinale.

      Notes – Strains representing Nig. officinalis and close to Nig. cooperae (BRIP 72440a, ex-type) (ITS 8/451 bp; tef1-α 72/444 bp; tub2 30/337 bp) and Nig. guilinensis (CGMCC 3.18124, ex-type) (ITS 7/452 bp; tef1-α 73/443 bp; tub2 29/340 bp). Morphologically, Nig. officinalis can be differentiated from Nig. cooperae by its bigger conidia (13.32–17.40 × 10.37–15. 64 vs. 10–12.5 × 8.5–10.5 μm)[125], and from Nig. guilinensis by its conidia (pale brown to brown, slightly guttulate, 13.32–17.40 × 10.37–15.64 vs. black, shiny, smooth, 11.5–15 μm; ellipsoidal, 10.5–14 × 8–12 μm)[82]. Based on comparison of morphology and phylogenetic trees, we described Nig. officinalis as a new species.

      Nigrospora penniseti Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 31

      Figure 31. 

      Nigrospora penniseti (CGMCC 3.29237, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573267

      Etymology – The epithet "penniseti" refers to the host of the holotype, specifically Pennisetum purpureum.

      Asexual morph: hyphae dense, smooth, hyaline to pale brown, branched, septate, 3.2–5.7 μm diameter. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells are aggregated in clusters on hyphae, and are pale brown, ellipsoidal to cylindrical, 6.72–15.46 × 6.01–9.36 μm (av. = 9.96 ± 3.08 × 7.36 ± 1.10, n = 23). Conidia solitary, elliptical or subglobose, pale brown to brown, shiny, slightly guttulate, aseptate, 14.73–19.35 × 9.92–16.92 μm (av. = 17.10 ± 1.25 × 13.85 ± 2.47, n = 24).

      Culture characteristics – On the PDA medium, dense, entire margin, aerial mycelium white, and reverse white. The diameter of the colony was 90 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Qiongzhong, Baihualing Tropical Rainforest (19.005802 N, 109.825167 E, 392 m), on diseased leaves of Pennisetum purpureum, 3 December 2024, Q.Y. Liu (HSAUP 14310-1A, holotype), ex-type culture CGMCC 3.29237 = SAUCC 14310-1A; ibid., HSAUP 14310-1B, living culture 14310-1B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Pennisetum purpureum.

      Notes – Two strains, representing Nig. penniseti clustered in a well-supported clade, and are close to Nig. covidalis (CGMCC 3.20538, ex-type) (ITS 2/454 bp; tef1-α 39/459 bp; tub2 6/327 bp). Morphologically, Nig. penniseti can be differentiated from Nig. covidalis by its larger conidiogenous cells (6.72–15.46 × 6.01–9.36 vs. 5–8.5 × 4.5–7 μm) and bigger conidia (14.73–19.35 × 9.92–16.92 vs. 9–14 µm diameter)[124]. Thus, we described Nig. penniseti as a new species.

      Nigrospora pseudosasae Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 32

      Figure 32. 

      Nigrospora pseudosasae (CGMCC 3.29238, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–h) Conidia developed from conidiogenous cells. (i, j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573268

      Etymology – The epithet "pseudosasae" refers to the host of the holotype, specifically Pseudosasa japonica.

      Asexual morph: hyphae smooth, hyaline to pale brown, branched, septate, verrucose, 1.6–3.4 μm diameter. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells arise from hyphae, hyaline to pale brown, ellipsoidal, clavate to cylindrical, 6.96–12.70 × 3.85–6.71 μm (av. = 10.18 ± 2.19 × 5.11 ± 1.00, n = 17). Conidia globose or elliptical, brown, shiny, aseptate, 10.81–13.67 × 7.91–11.71 μm (av. = 12.63 ± 0.89 × 10.31 ± 1.12, n = 19).

      Culture characteristics – On the PDA medium, dense, entire margin, aerial mycelium white, crateriform, and reverse white. The diameter of the colony was 61 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Ledong Li Autonomous County, Jianfengling National Forest Park (18.700142 N, 108.812270 E, 126 m), on diseased leaves of Pseudosasa japonica, 4 December 2024, Y.L. Wang (HSAUP 14416-1, holotype), ex-type culture CGMCC 3.29238 = SAUCC 14416-1; ibid., on diseased leaves of bamboo (Poaceae sp.), 04 October 2023, Q.Y. Liu (HSAUP 6449-4), living cultures SAUCC 6449-4.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Pseudosasa japonica and bamboo.

      Notes – The strains, representing Nig. pseudosasae, are closely related to Nig. coryli (W18, ex-type) (tef1-α 58/426 bp, tub2 28/325 bp). Morphologically, Nig. pseudosasae can be differentiated from Nig. coryli by its conidia (globose or elliptical, brown, shiny, aseptate, 10.81–13.67 × 7.91–11.71 μm vs. globose or subglobose, 13–20.5 µm diameter, acrogenous, smooth, solitary, shiny, aseptate, black; ellipsoidal, 13.5–17.5 × 11.5–14 μm)[126]. Based on comparison of morphology and phylogenetic trees, we described Nig. pseudosasae as a new species.

    • Notes – Beltraniaceae was first proposed by Nannizzi[31] to accommodate the type genus Beltrania and several morphologically similar genera[35]. Members of Beltraniaceae typically produce biconic, lageniform to navicular conidia that may possess a hyaline band and swollen separating cells; their conidiophores, which may arise independently or from radially lobed setal basal cells, are another diagnostic feature[37,127,128]. To date, 11 genera validated by phylogenetic analysis have been accepted in Beltraniaceae[16].

      Beltraniella Subram.

      Notes – Beltraniella is a genus distinguished by its setiform conidiophores, polyblastic, sympodial, denticulate conidiogenous cells, turbinate or biconic conidia with a truncate base, rostrate apex, and a hyaline transverse band. The genus Beltraniella was established by Beltraniella odinae as a type species from Odina wodier in India[129,130].

      In the phylogenetic tree consisting of 43 Beltraniella isolates, the strain of Castanediella couratarii (CBS 579.71) was used as the outgroup. The alignment sequences have 1,377 concatenated characters, viz. 1–583 (ITS) and 584–1,377 (LSU). Among these sequences, 1,242 characters were constant, 84 characters were variable and parsimony-uninformative, and 51 characters were parsimony-informative. The topologies were consistent in the ML and BI analyses; therefore, only the ML tree is displayed in this study. The 42 strains were identified to belong to 22 species by phylogenetic analysis of ITS and LSU gene sequences. BI analysis was performed over 1,780,000 generations in 3,562 trees; 3/4 of the trees were employed tor compute the posterior probability using the majority-rule consensus tree (Fig. 33; first value: BIPP ≥ 0.90 displayed).

      Figure 33. 

      Phylogenetic tree of the genus Beltraniella based on a concatenated alignment of ITS and LSU sequences, with Castanediella couratarii serving as the outgroup. The Bayesian inference posterior probability (right, BIPP ≥ 0.90) and the maximum likelihood bootstrap value (left, MLBV ≥ 70%) are shown as MLBV/BIPP above the nodes. Strains marked "*" in the tree are represented as ex-type or ex-epitype. Strains in this study are highlighted in red. The scale bar at the bottom indicates 0.01 substitutions per site.

      Beltraniella obovata D.H. Li, J.W. Xia & X.G. Zhang, sp. nov. Fig. 34

      Figure 34. 

      Beltraniella obovata (CGMCC 3.29382, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 14 days; (b) top view and (c) bottom view. (d) Conidiophores and setae on pine needle. (e) Asci. (f) Ascospores. (g) Seta. (h) Conidia. Scale bars: 10 μm (e–h).

      Fungal names: FN 573263

      Etymology – The epithet "obovata" refers to the host of the holotype, specifically Altingia obovata.

      Asexual morph: hyphomycetous. Mycelium mostly immersed in the substratum, composed of septate, branched subhyaline hyphae. Setae numerous, erect, straight or flexuous, unbranched, single or in small groups, thick-walled, verrucose, dark brown, 80.5–240.5 μm long, 5.5–9.0 μm wide at the base, tapering to a pointed apex, arising from radially lobed basal cells, 10.2–17.0 μm diameter. Conidiophores macronematous, sometimes setiform, single, straight, septate, partly verrucose, thick-walled to smooth-walled, 130.0–328.7 × 3.0–8.6 μm (mean ± SD = 228.0 ± 57.5 × 5.0 ± 1.2 μm, n = 30), sometimes branched at the apical region, dark brown swollen base, paler, and slightly tapering towards a pointed apex. Conidiogenous cells holoblastic, monoblastic to polyblastic, integrated, terminal. Conidia solitary to aggregated, acrogenous, simple, dry, straight, smooth, thin-walled, turbinate to pyriform, rostrate to pointed at the proximal end, rounded at the distal end, hyaline to subhyaline, 22.8–25.6 μm (mean ± SD = 24.2 ± 1.0 μm, n = 30) long, 6.0–8.0 μm wide (mean ± SD = 7.2 ± 0.6 μm, n = 30) in the broadest part. Sexual morph: Ascomata not seen. Asci 38.5–73.0 × 10.0–16.5 μm (mean ± SD = 56.5 ± 10.0 × 12.8 ± 1.6 μm, n = 30), unitunicate, 8-spored, subcylindrical to long obovoid, slightly curved. Ascospores 21.0–24.0 × 4.3–6.4 μm (mean ± SD = 22.5 ± 1.2 × 5.2 ± 0.5 μm, n = 30), overlapping uni- to bi-seriate, subhyaline to pale yellow, subcylindrical to long obovoid, slightly curved.

      Culture characteristics – The colony surfaces are light yellowish-brown, verrucose, with moderate aerial mycelia, featuring a distinct circular growth zone; reverse fawn on the PDA medium. The diameter of the colony was 90 mm after culturing for 14 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.726546 N, 109.867095 E, 934 m), on diseased Altingia obovata leaves, 9 March 2023, D.H. Li (HSAUP 2895-5, holotype), ex-type culture CGMCC 3.29382 = SAUCC 2895-5; ibid., HSAUP 2895-6, living culture SAUCC 2895-6.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Altingia obovata leaves.

      Notes – The strains, representing Beltraniella obovata, are closely related to Beltraniella humicola (CBS 203.64, ex-type) (ITS 9/556 bp; LSU 5/780 bp) and Beltraniella hesseae (BRIP 72433a, ex-type) (ITS 8/577 bp; LSU 3/781 bp)[131,132]. Regarding Beltraniella humicola and B. hesseae, no morphological description was provided. Based on the comparison of phylogenetic trees, we described the collection of the two strains as a new species.

    • Notes – Sporocadaceae, a species-rich and cosmopolitan fungal family introduced by Corda[38], includes plant pathogens, endophytes, saprobes, and parasites of humans and animals, and is typified by its appendage-bearing conidia[44]. Now, 35 genera validated by phylogenetic analysis have been accepted in Sporocadaceae[16].

      Neopestalotiopsis Maharachch., K.D. Hyde & Crous

      Notes – Neopestalotiopsis was proposed with the type species Neopestalotiopsis protearum[42]. Members of Neopestalotiopsis, primarily found as plant pathogens, endophytes, or saprobes in tropical, subtropical ecosystems and other habitats such as caves[44].

      In the phylogenetic tree encompassing 259 Neopestalotiopsis isolates, the strains of Pestalotiopsis colombiensis (CBS 118553) and Pestalotiopsis diversiseta (MFLUCC 12-0287) were employed as the outgroups. The ultimate alignment was composed of 1928 concatenated characters, viz. 1–594 (ITS), 595–1,148 (tef1-α), and 1,149–1,928 (tub2). Among these sequences, 1,190 characters were constant, 271 characters were variable and parsimony-uninformative, and 467 characters were parsimony-informative. The topologies were consistent in the ML and BI analyses; therefore, only the ML tree is shown in this study. The 257 strains were identified as 140 species based on phylogenetic analysis of ITS, tef1-α, and tub2 gene sequences. BI analysis was carried out for 5,000,000 generations in 10,002 trees; 3/4 of the trees were utilized to compute the posterior probability using the majority-rule consensus tree (Fig. 35; first value: BIPP ≥ 0.90 displayed).

      Figure 35. 

      Phylogenetic tree of the genus Neopestalotiopsis based on a concatenated alignment of ITS, tef1-α, and tub2 sequences, with Pestalotiopsis colombiensis and P. diversiseta serving as outgroups. The Bayesian inference posterior probability (right, BIPP ≥ 0.90) and the maximum Likelihood bootstrap value (left, MLBV ≥ 50%) are shown as MLBV/BIPP above the nodes. Strains marked "*" in the tree are represented as ex-type or ex-epitype. Strains in this study are highlighted in red. The scale bar at the bottom indicates 0.1 substitutions per site. To enhance the visual appeal of the evolutionary tree layout, certain branches are shortened by two diagonal lines ( "//" ) with the number of times. The figure shows partial branches of the evolutionary tree and the full evolutionary tree can be found in Supplementary Information 12.

      Neopestalotiopsis bambooensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 36

      Figure 36. 

      Neopestalotiopsis bambooensis (CGMCC 3.29364, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e–f) Conidia developed from conidiogenous cells. (g–j) Conidia. Scale bars: 10 μm (e–j).

      Fungal names: FN 573262

      Etymology – The epithet "bambooensis" refers to the host of the holotype, specifically bamboo.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, and cylindrical, 5.21–13.54 × 1.58–3.80 μm (av. = 8.70 ± 2.63 × 2.93 ± 0.73 μm). Conidia fusiform, slightly curved or straight, 17.53–25.37 × 5.47–7.80 μm (av. = 21.32 ± 2.22 × 6.46 ± 0.68 μm, n = 19); mostly 4-septate, occasionally 3-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 2.37–3.49 μm (av. = 3.06 μm) long, hyaline, smooth, thin-walled; the two or three intermediate cells columnar or cylindrical, concolourous or versicolor, brown to pale brown, 12.23–15.97 μm (av. = 13.95 ± 0.98 μm) long, septa and peri-clinal walls darker than the rest of the cell; second cell from the base pale brown, 3.43–5.96 μm (av. = 4.38 ± 0.68 μm) long; third cell brown or pale brown, 2.90–7.34 μm (av. = 4.75 ± 1.08 μm)long; fourth cell pale brown, 3.51–6.10 μm (av. = 4.77 ± 0.83 μm) long; apical cell hyaline, subcylindrical, 1.25–4.87 μm (av. = 3.40 ± 1.12 μm) long; with 0–3 tubular apical appendages (mostly 2), unbranched, 17.67–38.39 μm (av. = 29.11 ± 6.06 μm) long; basal appendage single, tubular, unbranched, 2.65–8.57 μm (av. = 5.53 ± 2.08 μm) long. Sexual morph not observed.

      Culture characteristics – The colony surfaces are cream-colored, prominent, floccose, forming concentric rings and reverse white on the PDA medium. The diameter of the colony was 78 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.660546 N, 109.936445 E, 94 m), on diseased leaves of bamboo (Poaceae sp.), 17 March 2023, Q.Y. Liu (HSAUP 7656-2A, holotype), ex-type culture CGMCC 3.29364 = SAUCC 7656-2A; ibid., HSAUP 7656-2B, living culture SAUCC 7656-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of bamboo (Poaceae sp.).

      Notes – Neopestalotiopsis bambooensis (SAUCC 7656-2A and SAUCC 7656-2B) formed a distinct branching relationship with Neo. brasiliensis (COAD 2166, ex-type). The isolates are closely related to Neo. brasiliensis (COAD 2166, ex-type) and show nucleotide differences in the tef1-α (10/457 bp) and tub2 (1/430 bp) gene regions. Neopestalotiopsis bambooensis was morphologically distinct from Neo. brasiliensis in its number of septa (4-septate, occasionally 3-septate vs. 4-septate) and apical appendages (0–3 vs. 1–3)[133]. Thus, we described this fungus as a new species.

      Pestalotiopsis Steyaert

      Notes – Steyaert[41] established the genus Pestalotiopsis with Pestalotiopsis guepinii as the type species to accommodate species possessing 4-septate conidia, a key feature that differentiates it from Pestalotia. Pestalotiopsis is a common fungal genus that inhabits plant tissues as an endophyte, pathogen, or saprophyte, and it is well-known as a causal agent of leaf spot diseases[134].

      In the phylogenetic tree containing 306 Pestalotiopsis isolates, the strain of Nonappendiculata quercina (CBS 270.82) was selected as the outgroup. The ultimate alignment comprised 1,646 concatenated characters, viz. 1–533 (ITS), 534–1,044 (tef1-α), and 1,045–1,646 (tub2). Among the sequences, 932 characters were constant, 180 characters were variable and parsimony-uninformative, and 534 characters were parsimony-informative. The topologies were consistent in the ML and BI analyses; therefore, only the ML tree is shown in this study. The 305 strains were identified as 173 species by phylogenetic analysis of ITS, tef1-α, and tub2 gene sequences. BI analysis was performed for 19,000,000 generations in 38,002 trees; 3/4 of the trees were used to compute the posterior probability using the majority-rule consensus tree (Fig. 37; first value: BIPP ≥ 0.90 displayed).

      Figure 37. 

      Phylogenetic tree of the genus Pestalotiopsis based on a concatenated alignment of ITS, tef1-α, and tub2 sequences, with Nonappendiculata quercina serving as the outgroup. The Bayesian inference posterior probability (right, BIPP ≥ 0.90) and the maximum likelihood bootstrap value (left, MLBV ≥ 60%) are shown as MLBV/BIPP above the nodes. Ex-type cultures are indicated in boldface and strains from the present study are highlighted in red. The scale bar at the bottom indicates 0.09 substitutions per site. To enhance the visual appeal of the evolutionary tree layout, certain branches are shortened by four diagonal lines ( "//" ) with the number of times. Furthermore, three single-gene trees were evaluated for Pestalotiopsis (Supplementary Information 13).

      Pestalotiopsis castanopsis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 38

      Figure 38. 

      Pestalotiopsis castanopsis (CGMCC 3.29376, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and top view (c). (d) Conidiomata formed in culture. (e) Conidia developed from conidiogenous cells. (f–n) Conidia. Scale bars: 10 μm (e–n).

      Fungal names: FN 573303

      Etymology – The epithet "castanopsis" refers to the host of the holotype, specifically Castanopsis carlesii.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, cylindrical, 4.75–9.90 × 1.67–3.11 μm (av. = 7.54 ± 1.46 × 2.15 ± 0.50 μm). Conidia fusiform, straight or slightly curved, 21.77–27.39 × 4.08–6.14 μm (av. = 24.70 ± 1.49 × 5.06 ± 0.58 μm, n = 17); 1-septate, 2-septate, 3-septate, 4-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.31–8.32 μm (av. = 5.28 μm) long, hyaline, smooth, thin-walled; the intermediate cells columnar or cylindrical, versicolor, hyaline to pale brown, 11.92–23.98 μm (av. = 16.01 ± 2.04 μm) long, septa, and periclinal walls darker than the rest of the cell; second cell from the base pale brown, 3.79–6.44 μm (av. = 5.08 ± 0.79 μm) long; third cell pale brown, 5.10–8.17 μm (av. = 6.77 ± 0.72 μm) long; fourth cell pale brown, 4.48–9.53 μm (av. = 9.54 ± 1.17 μm) long; apical cell hyaline, subcylindrical, 4.45–7.72 μm (av. = 7.72 ± 0.86 μm) long; with 1–5 tubular apical appendages (mostly 2), unbranched, 15.59–43.35 μm (av. = 27.83 ± 6.55 μm) long; basal appendages 1–2, tubular, unbranched, 2.10–8.17 μm (av. = 4.99 ± 1.48 μm) long. Sexual morph not observed.

      Culture characteristics – The colony is nearly circular, with undulate edge, flat, white, floccose, forming concentric rings and reverse pale yellow on the PDA medium. The diameter of the colony was 72 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Diaoluoshan National Forest Park (18.660546 N, 109.936445 E, 94 m), on diseased leaves of Castanopsis carlesii, 26 June 2024, X.Y. Liu (HSAUP 7607-2A, holotype), ex-type culture CGMCC 3.29376 = SAUCC 7607-2A; ibid., HSAUP 7607-2B, living culture SAUCC 7607-2B.

      Distribution – China, Hainan Province.

      Ecology – Associated with diseased leaves of Castanopsis carlesii.

      Notes – Pestalotiopsis castanopsis (SAUCC 7607-2A and SAUCC 7607-2B) formed a distinct branching relationship with P. shorea (MFLUCC 12–0314, ex-type). The isolates are closely related to P. shorea (MFLUCC 120314, ex-type) and showed nucleotide differences in the ITS (12/513 bp), tef1-α (17/408 bp), and tub2 (6/411 bp) gene regions. Pestalotiopsis castanopsis was morphologically distinct from P. shorea in its apical appendages (1–5 vs. 1–3) and the number of septa in conidia (1-septate, 2-septate, 3-septate, 4-septate vs. 4-septate)[135]. Thus, we describd P. castanopsis as a new species.

      Pestalotiopsis nanpingensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 39

      Figure 39. 

      Pestalotiopsis nanpingensis (CGMCC 3.29375, ex-type culture). (a–b) Colonies after incubation on PDA for 7 days; (a) top view and (b) bottom view. (c) Conidiomata formed in culture. (d) Conidia developed from conidiogenous cells. (e–l) Conidia. Scale bars: 10 μm (d–l).

      Fungal names: FN 573304

      Etymology – The epithet "nanpingensis" refers to the host of the holotype collected from Nanping City, Fujian Province.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, cylindrical. Conidia fusiform, straight or slightly curved, hyaline to pale brown 15.85–22.69 × 4.55–5.82 μm (av. = 19.47 ± 2.10 × 5.14 ± 0.38 μm, n = 17); 4-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.19–6.27 μm (av. = 4.18 μm) long, hyaline, smooth, thin-walled; the three intermediate cells columnar or cylindrical, concolourous, pale brown, 10.41–13.72 μm (av. = 12.10 ± 0.97 μm) long, septa and periclinal walls darker than the rest of the cell; second cell from the base pale brown, 4.07–5.11 μm (av. = 4.53 ± 0.30 μm) long; third cell pale brown, 3.49–5.64 μm (av. = 4.71 ± 0.53 μm) long; fourth cell pale brown, 3.17–5.57 μm (av. = 4.38 ± 0.58 μm) long; apical cell hyaline, subcylindrical, 2.18–4.32 μm (av. = 3.22 ± 0.54 μm) long; with 0–4 tubular apical appendages (mostly 2), unbranched, 2.05–15.46 μm (av. = 11.31 ± 4.04 μm) long; basal appendage 0–1, tubular, unbranched, 2.61–6.67 μm (av. = 4.17 ± 1.11 μm) long.

      Culture characteristics – The colony is nearly circular, granular, flat, white, floccose, reverse pale yellow on the PDA medium. The diameter of the colony was 65 mm after culturing for 7 days at 25 °C.

      Material examined – China, Fujian Province, Nanping City, Wuyishan Rare and Precious Botanical Garden (27.747133 N, 117.677600 E, 723 m), on decaying leaves, 19 October 2024, Y.L. Wang (HSAUP 10887-3A, holotype), ex-type culture CGMCC 3.29375 = SAUCC 10887-3A; ibid., HSAUP 10887-3B, living culture SAUCC 10887-3B.

      Distribution – China, Fujian Province.

      Ecology – Associated with decaying leaves.

      Notes – Pestalotiopsis nanpingensis (SAUCC 10887-3A and SAUCC 10887-3B) formed a distinct branching relationship with P. shaanxiensis (CFCC 54958, ex-type), P. biciliata (CBS 124463, ex-type), P. ficicrescens (HGUP 861, ex-type), P. camelliae-oleiferae (CSUFTCC 08, ex-type), and P. cyclosora (HJAUP C1724.221, ex-type). Sequence comparisons with P. shaanxiensis (CFCC 54958, ex-type) revealed nucleotide differences in ITS (1/503 bp), tef1-α (3/406 bp), and tub2 (3/431 bp) gene regions, morphologically distinct from P. shaanxiensis in its conidia size (15.85–22.69 × 4.55–5.82 μm vs. (21)22–24.5(25) by (7)7.5–8.5(9) μm) and apical appendages (0–4 vs. 3)[134]. Sequence comparisons with P. biciliata (CBS 124463, ex-type strain) revealed differences in ITS (1/503 bp), tef1-α (7/406 bp), and tub2 (3/431 bp) gene regions, morphologically distinct from P. biciliata in its conidia size (15.85–22.69 × 4.55–5.82 vs. (21–)22–28.5(–30) × (5.5–)6–7.5(–8) μm), apical appendages (0–4 vs. 2–3) and basal appendages (0–1 vs. 2)[42]. Sequence comparisons with P. ficicrescens (HGUP 861, ex-type) revealed differences in ITS (4/502 bp), tef1-α (8/406 bp), and tub2 (6/431 bp) gene regions, morphologically distinct from P. ficicrescens in its number of apical appendages (0–4 vs. 2–3) and basal appendage (0–1 vs. single)[136]. Sequence comparisons with P. camelliae-oleiferae (CSUFTCC 08, ex-type) revealed differences in ITS (5/498 bp), tef1-α (8/406 bp), and tub2 (5/431 bp) gene regions, morphologically distinct from P. camelliae-oleiferae in its number of apical appendages (0–4 vs. 2–3)[137]. Sequence comparisons with P. cyclosora (HJAUP C1724.221, ex-type) revealed differences in ITS (1/503 bp), tef1-α (6/219 bp), and tub2 (5/431 bp) gene regions, morphologically distinct from P. cyclosora in its conidia size (15.8522.69 × 4.55–5.82 vs. 16.3–26.1 × 5.4–7.1 μm) and number of apical appendages (0–4 vs. 1–4 (mostly 2 or 3))[138]. Thus, we described P. nanpingensis as a new species.

      Pestalotiopsis rhizomaticola Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 40

      Figure 40. 

      Pestalotiopsis rhizomaticola (CGMCC 3.29378, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e) Conidia developed from conidiogenous cells. (f–n) Conidia. Scale bars: 10 μm (e–n).

      Fungal names: FN 573305

      Etymology – The epithet "rhizomaticola" refers to the host of the holotype, specifically Dioscoreae rhizoma.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, cylindrical, 6.04–12.90 × 1.72–4.16 μm (av. = 9.05 ± 2.31 × 2.38 ± 0.82 μm). Conidia fusiform, straight or slightly curved, 17.83–26.76 × 4.58–6.62 μm (av. = 21.39 ± 2.93 × 5.80 ± 0.81 μm, n = 15); 4-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.61–6.41 μm (av. = 4.80 μm) long, hyaline, smooth, thin-walled; the three intermediate cells columnar or cylindrical, concolourous, pale brown, 11.42–14.85 μm (av. = 13.20 ± 0.89 μm) long, septa and periclinal walls darker than rest of the cell; second cell from the base pale brown, 3.40–6.10 μm (av. = 4.74 ± 0.66 μm) long; third cell brown or light brown, 3.71–6.07 μm (av. = 4.87 ± 0.73 μm) long; fourth cell pale brown, 3.91–6.00 μm (av. = 4.64 ± 0.60 μm) long; apical cell hyaline, subcylindrical, 2.68–6.19 μm (av. = 4.00 ± 1.05 μm) long; with 0–4 tubular apical appendages (mostly 2), unbranched, 1.96–16.16 μm (av. = 11.88 ± 4.23 μm) long; basal appendages 0–2, tubular, unbranched, 2.56–5.54 μm (av. = 4.24 ± 0.92 μm) long.

      Culture characteristics – The colony is nearly circular, flat, and floccose, with yellow centers and white margins; the reverse exhibited the same color on the PDA medium. The diameter of the colony was 78 mm after culturing for 7 days at 25 °C.

      Material examined – China, Hainan Province, Ledong Li Autonomous County, Jianfeng Town (18.688815 N, 108.858742 E, 697 m), on leaves of Dioscoreae rhizoma, 12 April 2023, D.H. Li (HSAUP 3735-5A, holotype), ex-type culture CGMCC 3.29378 = SAUCC 3735-5A; ibid., HSAUP 3735-5B, living culture SAUCC 3735-5B.

      Distribution – China, Hainan Province.

      Ecology – Associated with leaves of Dioscoreae rhizoma.

      Notes – Pestalotiopsis rhizomaticola (SAUCC 3735-5A and SAUCC 3735-5B) formed a distinct branching relationship with P. aggestorum (LC6301, ex-type) and P. silvicola (CFCC 55296, ex-type). Pestalotiopsis rhizomaticola and P. aggestorum differed by 10 bp across three loci: 1/503 bp in ITS, 6/413 bp in tef1-α, and 3/436 bp in tub2 gene regions. Pestalotiopsis rhizomaticola was morphologically distinct from P. aggestorum in the length of its apical appendages (2.68–6.19 vs. 18–28 μm) and basal appendages (2.56–5.54 vs. 5–14 μm)[139]. The isolates are closely related to P. silvicola (CFCC 55296, ex-type) and comparisons of their sequences revealed 10 bp differences across three loci (1/502 bp in ITS, 5/413 bp for tef1-α, 4/435 bp for tub2). Pestalotiopsis rhizomaticola differed morphologically from P. silvicola in the shape of its apical cell (subcylindrical vs. conic with an acute apex) and the color of its median cells (pale brown vs. brown)[134]. Thus, we described this fungus as a new species.

      Pestalotiopsis rostrata Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 41

      Figure 41. 

      Pestalotiopsis rostrata (CGMCC 3.29374, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, f) Conidia developed from conidiogenous cells. (g–k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573306

      Etymology – The epithet "rostrata" refers to the host of the holotype, specifically Magnolia rostrata.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, cylindrical, 6.09–13.63 × 2.08–3.80 μm (av. = 9.52 ± 2.56 × 2.75 ± 0.69 μm). Conidia fusiform, straight or slightly curved, 22.46–31.30 × 4.71–6.02 μm (av. = 26.07 ± 2.28 × 5.63 ± 0.58 μm, n = 16); 4-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.41–6.77 μm (av. = 5.19 μm) long, hyaline, smooth, thin-walled; the three intermediate cells columnar or cylindrical, concolourous, pale brown, 14.27–19.32 μm (av. = 17.10 ± 1.50 μm) long, septa and periclinal walls are darker than the rest of the cell; the second cell from the base is pale brown, 5.30–7.82 μm (av. = 6.39 ± 0.67 μm) long; the third cell is pale brown, 4.41–7.06 μm (av. = 5.89 ± 0.67 μm) long; the fourth cell is pale brown, 4.76–7.72 μm (av. = 7.72 ± 0.82 μm) long; the apical cell is hyaline, subcylindrical, 3.75–6.68 μm (av. = 4.93 ± 0.87 μm) long; with 1–4 and six tubular apical appendages (mostly 2), unbranched, 9.19–20.18 μm (av. = 15.27 ± 3.20 μm) long; basal appendage single, tubular, unbranched, 2.48–6.07 μm (av. = 3.86 ± 1.20 μm) long.

      Culture characteristics – The colony is nearly circular, with undulate edge, flat, white, floccose, reverse white on the PDA medium. The diameter of the colony was 71 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Jinghong City (22.1695431 N, 100.863829 E, 736 m), on diseased leaves of Magnolia rostrata, 19 March 2023, X.Y. Liu (HSAUP 2262-1A, holotype), ex-type culture CGMCC 3.29374 = SAUCC 2262-1A; ibid., HSAUP 2262-1B, living culture SAUCC 2262-1B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with diseased leaves of Magnolia rostrata.

      Notes – Pestalotiopsis rostrata (SAUCC 2262-1A and SAUCC 2262-1B) formed a distinct branching relationship to P. alloschemones (CGMCC 3.23480, ex-type). The isolates are closely related to P. alloschemones (CGMCC 3.23480, ex-type) and comparisons of their sequences revealed 13 bp differences across two loci (8/376 bp for tef1-α, 5/380 bp for tub2). Pestalotiopsis rostrata is distinct from P. alloschemones in its conidia (22.46–31.30 × 4.71–6.02 vs. 17–22.5 × 4.5–6 μm) and P. alloschemones possesses branched apical appendages and a basal appendage[44]. Thus, we described this fungus as a new species.

      Pestalotiopsis yuxiensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 42

      Figure 42. 

      Pestalotiopsis yuxiensis (CGMCC 3.29373, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e, f) Conidia developed from conidiogenous cells. (g–o) Conidia. Scale bars: 10 μm (e–o).

      Fungal names: FN 573307

      Etymology – The epithet "yuxiensis" refers to the host of the holotype collected from the Yuxi City, Yunnan Province.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, hyaline, cylindrical, 6.97–20.24 × 1.41–2.96 μm (av. = 13.34 ± 5.86 × 1.95 ± 0.59 μm). Conidia fusiform, straight or slightly curved, 18.91–25.61 × 6.72–9.29 μm (av. = 22.91 ± 2.34 × 7.80 ± 0.81 μm, n = 15); 4-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.17–8.39 μm (av. = 5.77 μm) long, hyaline, smooth, thin-walled; the three intermediate cells columnar or cylindrical, versicolor, brown to pale brown, 14.32–17.16 μm (av. = 15.73 ± 0.91 μm) long, septa and periclinal walls darker than the rest of the cell; second cell from the base pale brown, 4.25–6.94 μm (av. = 5.65 ± 0.79 μm) long; third cell brown or light brown, 4.89–7.82 μm (av. = 6.23 ± 0.68 μm) long; fourth cell pale brown, 3.47–7.13 μm (av. = 5.71 ± 0.85 μm) long; apical cell hyaline, subcylindrical, 2.80–4.58 μm (av. = 3.50 ± 0.50 μm) long; with 2–4 tubular apical appendages (mostly 2), unbranched, 2.78–29.02 μm (av. = 19.99 ± 6.82 μm) long; basal appendages 0–2, tubular, spatulate, or sometimes knobbed, curved, centric, mostly branched, 2.38–14.11 μm (av. = 5.75 ± 2.89 μm) long.

      Culture characteristics – The colony is nearly circular, with undulate edge, flat, white, floccose, reverse white on the PDA medium. The diameter of the colony was 80 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Yuxi City, Xinping Yi and Dai Autonomous County (23.960428 N, 101.937698 E, 2123 m), on unidentified diseased leaves, 13 May 2023, Q.Y. Liu (HSAUP 8412-1A, holotype), ex-type culture CGMCC 3.29373 = SAUCC 8412-1A; ibid., HSAUP 8412-1B, living culture SAUCC 8412-1B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with unidentified diseased leaves.

      Notes – Pestalotiopsis yuxiensis (SAUCC 8412-1A and SAUCC 8412-1B) formed a distinct branching relationship with P. eriobotryae (HJAUP C1742.221, ex-type) and P. xuefengensis (HJHB1, ex-type), and comparisons of their nucleotide sequences revealed 5 and 18 bp differences, respectively. Moreover, P. yuxiensis is morphologically distinguished from P. eriobotryae and P. xuefengensis in its basal appendages (0–2, tubular, spatulate, or sometimes knobbed, curved, centric, mostly branched basal appendages vs. single filiform, unbranched)[138,140]. The PHI test in Supplementary Information 14 did not find statistically significant evidence for recombination (p = 0.5). Thus, we described this fungus as a new species.

      Pseudopestalotiopsis Maharachch., K.D. Hyde & Crous

      Notes – Pseudopestalotiopsis was proposed with the type species Pseudopestalotiopsis theae[42]. Morphologically, Pseudopestalotiopsis is morphologically distinguished from Neopestalotiopsis by its concolorous median cells, while Neopestalotiopsis possesses versicolored ones[42].

      In the phylogenetic tree encompassing 58 Pseudopestalotiopsis isolates, the strain of Neopestalotiopsis clavispora (MFLUCC 12-0281) acted as the outgroup. The ultimate alignment contained 1,486 concatenated characters, viz. 1–535 (ITS), 536–1,043 (tef1-α), and 1,044–1,486 (tub2). Among these sequences, 1,113 characters were constant, 232 characters were variable and parsimony-uninformative, and 141 characters were parsimony-informative. The topologies were consistent in the ML and BI analyses; thus, only the ML tree is displayed in this study. The 57 strains were defined as 34 species by phylogenetic analysis of ITS, tef1-α, and tub2 gene sequences. BI analysis was conducted on 4,095,000 generations in 8,192 trees; 3/4 of the trees were utilized to compute the posterior probability using the majority-rule consensus tree (Fig. 43; first value: BIPP ≥ 0.90 displayed).

      Figure 43. 

      Phylogenetic tree of the genus Pseudopestalotiopsis based on a concatenated ITS, tef1-α, and tub2 sequences alignment, with Neopestalotiopsis clavispora serving as outgroup. The Bayesian Inference Posterior Probability (right, BIPP ≥ 0.90) and the Maximum Likelihood Bootstrap Value (left, MLBV ≥ 95%) are shown as BIPP/MLBV above the nodes. Those marked "*" in the tree are represented as ex-type or ex-epitype strains. Strains isolated in this study were highlighted in red. The scale bar at the bottom indicates 0.01 substitutions per site. To enhance the visual appeal of the evolutionary tree layout, certain branches are shortened by two diagonal lines ( "//" ) with the number of times.

      Pseudopestalotiopsis xishuangbannaensis Q.Y. Liu, Z. Li & X.G. Zhang, sp. nov. Fig. 44

      Figure 44. 

      Pseudopestalotiopsis xishuangbannaensis (CGMCC 3.29371, ex-type culture). (a) Leaf of the host plant. (b, c) Colonies after incubation on PDA for 7 days; top view (b) and bottom view (c). (d) Conidiomata formed in culture. (e) Conidia developed from conidiogenous cells. (f–k) Conidia. Scale bars: 10 μm (e–k).

      Fungal names: FN 573261

      Etymology – The epithet "xishuangbannaensis" refers to the location where the type was collected, Xishuangbanna Primeval Forest Park, Yunnan Province.

      Asexual morph on PDA: conidiomata acervular, globose, black, solitary, releasing conidia in a black, slimy, globose mass. Conidiophores indistinct and reduced to conidiogenous cells. Conidiogenous cells discrete, smooth-walled, pale yellow, cylindrical or ampulliform, 3.63–11.19 × 2.18–3.82 μm (av. = 8.20 ± 2.35 × 2.85 ± 0.64 μm). Conidia fusiform, straight or slightly curved, 24.97–29.30 × 4.86–6.98 μm (av. = 27.51 ± 1.29 × 6.11 ± 0.67 μm, n = 25); mostly 4-septate, occasionally 5-septate, slightly constricted at the septa; basal cells obconic with a truncate base, 3.16–5.31 μm (av. = 4.67 μm) long, hyaline to pale yellow, smooth, thin-walled; the three or four intermediate cells columnar or cylindrical, homochromatic, pale brown, 16.43–21.13 μm (av. = 18.62 ± 1.51 μm) long, septa and peri-clinal walls darker than the rest of the cell; second cell from the base pale brown, 4.83–7.23 μm (av. = 6.12 ± 0.72 μm) long; third cell brown, 4.28–7.36 μm (av. = 5.95 ± 0.98 μm) long; fourth cell pale brown to brown, 2.81–8.52 μm (av. = 6.38 ± 1.77 μm) long; fifth cell pale brown to brown, 3.12–4.63 μm (av. = 3.98 ± 0.80 μm) long; apical cell hyaline, subcylindrical, collapsed, 2.70–6.00 μm (av. = 4.05 ± 0.89 μm) long; with 1–4 tubular apical appendages (mostly 2), unbranched or branched, 16.03–28.45 μm (av. = 22.59 ± 4.09 μm) long; basal appendages 0–1, tubular, unbranched, 1.44–6.74 μm (av. = 4.76 ± 1.55 μm) long.

      Culture characteristics – The colony surfaces are white, flat, floccose, with concentric rings, and reverse pale yellow on the PDA medium. The diameter of the colony was 75 mm after culturing for 7 days at 25 °C.

      Material examined – China, Yunnan Province, Jinghong City, Near Xishuangbanna Primitive Forest Park (22.0312884 N, 100.8769031 E, 678 m), on unidentified leaves, 17 March 2023, D.H. Li (HSAUP 2069-2A, holotype), ex-type culture CGMCC 3.29371 = SAUCC 2069-2A; ibid., HSAUP 2069-2B, living culture SAUCC 2069-2B.

      Distribution – China, Yunnan Province.

      Ecology – Associated with unidentified diseased leaves.

      Notes – Pseudopestalotiopsis xishuangbannaensis (SAUCC 2069-2A and SAUCC 2069-2B) formed a distinct branching relationship with Ps. kawthaungina (MM14-F0083, ex-type). The isolates are closely related to Ps. kawthaungina (MM14-F0083, ex-type), and sequence comparisons revealed 17 bp differences across three loci (1/488 bp in ITS, 1/475 bp in tef1-α, 15/420 bp in tub2). Pseudopestalotiopsis xishuangbannaensis was morphologically distinct from Ps. kawthaungina in its number of conidia septa (4-septate, occasionally 5-septate vs. four-septate) and conidia size (24.97–29.30 × 4.86–6.98 vs. 29.5–34.5 × 7–9 μm)[141]. Based on the comparison of morphology and phylogenetic trees, we described this fungus as a new species.

      List of accepted genera in Amphisphaeriales

      Amphisphaeriaceae G. Winter

      Amphisphaeria Ces. & De Not. (= Lepteutypa Petr.)

      Labridella Brenckle (= Griphosphaerioma Höhn., fide)

      Appendicosporaceae Samarak. & K.D. Hyde

      Appendicospora K.D. Hyde

      Neoamphisphaeria Samarak. & K.D. Hyde

      Apiosporaceae K.D. Hyde, J. Fröhl., Joanne E. Taylor & M.E. Barr

      Apiospora Sacc.

      Arthrinium Kunze

      Nigrospora Zimm.

      Beltraniaceae Nann.

      Anabeltraniomyces R.F. Castañeda, Mardones, P.M. Kirk & Gusmão

      Beltrania Penz.

      Beltraniella Subram.

      Beltraniopsis Bat. & J.L. Bezerra

      Hemibeltrania Piroz.

      Parabeltrania Rambelli ex R.F. Castañeda, Gusmão & P.M. Kirk

      Parapleurotheciopsis P.M. Kirk

      Porobeltraniella Gusmão

      Pseudobeltrania Henn.

      Pseudosubramaniomyces Crous

      Subsessila C.G. Lin & K.D. Hyde

      Castanediellaceae Hern.-Restr., Guarro & Crous

      Castanediella Hern.-Restr., Crous & M.J. Wingf.

      Clypeophysalosporaceae Giraldo & Crous

      Bagadiella Cheew. & Crous

      Clypeophysalospora H.J. Swart

      Neophysalospora Crous & M.J. Wingf.

      Paraphysalospora Crous (1)

      Plectosphaera Theiss.

      Hyponectriaceae Petr.

      Apiothyrium Petr.

      Arecomyces K.D. Hyde

      Arwidssonia B. Erikss.

      Cesatiella Sacc.

      Chamaeascus L. Holm, K. Holm & M.E. Barr

      Discosphaerina Höhn.

      Exarmidium P. Karst.

      Frondicola K.D. Hyde

      Hyponectria Sacc.

      Lichenoverruculina Etayo (1)

      Micronectria Speg.

      Papilionovela Aptroot

      Pellucida Dulym., Sivan., P.F. Cannon & Peerally

      Phragmitensis M.K.M. Wong, Poon & K.D. Hyde

      Physalospora Niessl

      Rachidicola K.D. Hyde & J. Fröhl.

      Xenothecium Höhn.

      Iodosphaeriaceae O. Hilber

      Iodosphaeria Samuels, E. Müll. & Petrini

      Melogrammataceae G. Winter

      Melogramma Fr.

      Oxydothidaceae Konta & K.D. Hyde

      Oxydothis Penz. & Sacc.

      Phlogicylindriaceae Senan. & K.D. Hyde

      Ciferriascosea Senan., Bhat, Camporesi & K.D. Hyde

      Idriellomyces Crous

      Phlogicylindrium Crous, Summerb. & Summerell

      Polyscytalum Riess

      Pseudomassariaceae Senan. & K.D. Hyde

      Leiosphaerella Höhn.

      Pseudapiospora Petr.

      Pseudomassaria Jacz.

      Pseudomassariella Petr.

      Pseudosporidesmiaceae Crous

      Pseudosporidesmium K.D. Hyde & McKenzie

      Pseudotruncatellaceae Crous

      Pseudotruncatella R.H. Perera, Camporesi, Maharachch. & K.D. Hyde

      Sporocadaceae Corda

      Allelochaeta Petr.

      Annellolacinia B. Sutton

      Bartalinia Tassi

      Broomella Sacc.

      Cavernicola P. Razaghi, F. Liu & L. Cai

      Ciliochorella Syd.

      Diploceras (Sacc.) Died

      Disaeta Bonar

      Discosia Lib.

      Distononappendiculata F. Liu, L. Cai & Crous

      Diversimediispora F. Liu, L. Cai & Crous

      Doliomyces Steyaert

      Heterotruncatella F. Liu, L. Cai & Crous

      Hyalotiella Papendorf

      Hymenopleella Munk

      Immersidiscosia Kaz. Tanaka, Okane & Hosoya

      Millesimomyces Crous & M.J. Wingf.

      Monochaetia (Sacc.) Allesch.

      Morinia Berl. & Bres.

      Neopestalotiopsis Maharachch., K.D. Hyde & Crous

      Nonappendiculata F. Liu, L. Cai & Crous

      Nothoseiridium Crous

      Parabartalinia F. Liu, L. Cai & Crous

      Pestalotiopsis Steyaert (= Pestalopezia Seaver

      Pseudopestalotiopsis Maharachch., K.D. Hyde & Crous

      Pseudosarcostroma F. Liu, L. Cai & Crous

      Robillarda Sacc.

      Sarcostroma Cooke

      Seimatosporium Corda

      Seiridium Nees

      Sporocadus Corda

      Strickeria Körb.

      Synnemapestaloides T. Handa & Y. Harada

      Truncatella Steyaert

      Xenoseimatosporium F. Liu, L. Cai & Crous

      Vialaeaceae P.F. Cannon

      Vialaea Sacc.

      Amphisphaeriales genera incertae sedis

      Chitonospora E. Bommer, M. Rousseau & Sacc.

      Neoarthrinium Ning Jiang

    • Molecular phylogenetic and evolutionary analyses have established a clear understanding of Amphisphaeriales, recognizing it as a distinct order within the subclass of Xylariomycetidae[7,8,10,142,143]. As is well known, Apiospora is a genus of the Apiosporaceae family, which belongs to the order Amphisphaeriales. In this study, the geographical distributions of all tested Apiospora strains were mainly collected from the tropical region of Hainan Province. All of them showed a high association with Poaceae hosts. 76% and 72% of these genus strains were derived from Poaceae and bamboo, respectively (Supplementary Information 15). These findings support the previous studies that Apiospora is primarily associated with Poaceae plants in tropical and subtropical climates[28,29,65,66]. The genus Apiospora exhibits diverse ecological roles, functioning not only as plant pathogens but also as endophytes. For instance, A. marii is associated with olive tree dieback in Italy[144], and A. phaeospermum causes leaf necrosis in Sicily[145]. Conversely, the endophytic A. saccharicola is known for producing industrial enzymes[146]. Furthermore, Apiospora species produces a wide array of metabolic products; the ones that are obtained from A. arundinis perform antifungal activity against Mucor hiemalis[14].

      In this study, we isolated several strains of multiple species from a single infected leaf (Supplementary Information 16). For example, three species (e.g., Apiospora baihualingensis, A. hydei, and A. qiongzhongensis) were identified from one diseased bamboo leaf. The co-infection (or mixed infection) phenomenon has been noted and discussed in previous studies[147151]. Therefore, these cases of multi-species infection in the same leaf reflect the pathobiome concept rather than the obsolete "one pathogen–one disease"[152,153]. Recently, Han et al.[151] demonstrated that the co-infection exemplified prominent advantages of the pathobiome concept: Firstly, microbes such as pathogens, endophytes, and saprophytes are often ambiguous and can mutually transition in nature[154156]. For example, for many so-called "pathogens", plant symptoms require high concentrations of conidia as a prerequisite[157,158]. Secondly, these microbes can generate new pathogenic variants through hybridization or gene transfer, serving as a potential driver of pathogen evolution[159163], Thirdly, since co-infection can enhance reproduction and transmission of pathogens[164], the pathobiome concept provides a mechanistic explanation for the positive correlation between the richness of fungal pathogens and the severity of threats to plant health[165]. Therefore, the widespread co-infection in the nature suggests that pathogens may closely interact with each other during disease development (Supplementary Information 16).

      Species of pestalotioid taxa are known to cause various plant diseases, primarily manifesting as leaf spots, blights, and diebacks[40,44,166]. However, these pestalotioid taxa pose a challenge for accurate identification due to their high degree of morphological similarity, particularly in the absence of molecular data[12]. The advancement of knowledge regarding pestalotioid taxa relies on the collection, isolation, sequencing, and global sharing of new fungal data, thus enabling the precise delineation and distinction of these taxonomic groups through systematic species-level comparisons[10]. Modern classification provides more accurate and reliable phylogenetic placements[44,138,140]. Therefore, phylogenetic analysis is superior to morphological characteristics in the classification of pestalotioid taxa. Integrating phylogenetic analysis with chemical data provides a robust foundation for elucidating the relationships among species in pestalotioid taxa, which is crucial for constructing a more accurate and coherent taxonomic framework for this fungal taxa.

      In this study, we revealed through phylogenetic analysis that several species of Apiospora, Neopestalotiopsis, and Pestalotiopsis exhibited abnormal long-branch attraction, as reported in previous publications[63,140,167]. This phenomenon may be attributed to several factors, including sequencing errors, unequal evolutionary rates among different lineages, the absence of closely related taxa, alignment sequences containing many introns, or horizontal gene transfer[168,169]. Therefore, phylogenetic resolution can be improved by expanding taxon sampling of extant species and applying suitable evolutionary models alongside informative outgroups[170].

      Amphisphaeriales comprises sixteen families and two incertae sedis genera[16]. To determine the familial placements of these two incertae sedis genera in Amphisphaeriales, we advance the understanding of three families (Apiosporaceae, Beltraniaceae, and Sporocadaceae) and six genera (Apiospora, Nigrospora, Beltraniella, Neopestalotiopsis, Pestalotiopsis, and Pseudopestalotiopsis) using morphology and multilocus sequence analysis. All these studies contribute to refining taxonomic boundaries and clarifying phylogenetic relationships, thereby establishing a robust framework of classification for this fungal taxa. To further conduct the taxonomic study of this fungal taxa, genomic analysis, enzyme activity assays, and biogeographical analysis should be used to understand their distribution patterns in different ecological environments.

      • No ethical statement was reported.

      • The authors confirm their contributions to the paper as follows: study conception and design: Liu QY and Zhang XG; data collection: Wang YL, Zhang MY, Dong ZX, Shang YX, Li DH, Yuan JY, Li XH, Jiang Y, Liu WW, and Wang XS; analysis and interpretation of results: Zhang ZX, Xia JW, Ai CC, Wang S, and Liu XY; draft manuscript preparation: Liu QY, Li Z, and Zhang XG. All authors reviewed the findings and approved the final manuscript.

      • All of the data that support the findings of this study are available in the main text or Supplementary Information.

      • We thank the following scholars for their help with sampling and culture isolation: Sheng H, Zhang J (The Graduate), Tao MF, and Yin CZ (Shandong Normal University); Liu XY and Wang YX (Northwest A & F University). This research was funded by the National Natural Science Foundation of China (Grant Nos. 32270024, 32370001, U2002203, 31900014, 32300011, and 32500003) and Science & Technology Fundamental Resources Investigation Program (Grant No. 2023FY101300).

      • The authors declare that they have no conflict of interest.

      • Copyright: © 2026 by the author(s). Published by Maximum Academic Press, Fayetteville, GA. This article is an open access article distributed under Creative Commons Attribution License (CC BY 4.0), visit https://creativecommons.org/licenses/by/4.0/.
    Figure (44)  Table (2) References (170)
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    Liu QY, Zhang ZX, Wang YL, Zhang MY, Dong ZX, et al. 2026. Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa. Mycosphere 17: e011 doi: 10.48130/mycosphere-0026-0010
    Liu QY, Zhang ZX, Wang YL, Zhang MY, Dong ZX, et al. 2026. Taxonomic analysis of Amphisphaeriales in China: discovery of multiple novel taxa. Mycosphere 17: e011 doi: 10.48130/mycosphere-0026-0010

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