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Issue: Vol. 772 No. 1: 27 Aug. 2026
Type: Article
Published: 2026-08-27
DOI: 10.11646/phytotaxa.772.1.5
Page range: 66-76
Abstract views: 18
PDF downloaded: 0

A new lignicolous freshwater fungus, Helicosporium (Tubeufiaceae, Tubeufiales) from Guizhou Province, China

School of Science; Mae Fah Luang University; Chiang Rai 57100; Thailand; Center of Excellence in Fungal Research; Mae Fah Luang University; Chiang Rai 57100; Thailand; School of Food and Pharmaceutical Engineering; Guizhou Institute of Technology; Guiyang 550025; P.R. China
Modern Industry School of Edible Fungi; Southwest Forestry University; Kunming 650224; P.R. China
School of Food and Pharmaceutical Engineering; Guizhou Institute of Technology; Guiyang 550025; P.R. China; Guizhou Key Laboratory of Agricultural Microbiology; Guizhou Academy of Agricultural Sciences; Guiyang 550009; P.R. China
School of Food and Pharmaceutical Engineering; Guizhou Institute of Technology; Guiyang 550025; P.R. China; Guizhou Key Laboratory of Agricultural Microbiology; Guizhou Academy of Agricultural Sciences; Guiyang 550009; P.R. China
School of Food and Pharmaceutical Engineering; Guizhou Institute of Technology; Guiyang 550025; P.R. China; Guizhou Key Laboratory of Agricultural Microbiology; Guizhou Academy of Agricultural Sciences; Guiyang 550009; P.R. China
Center of Excellence in Fungal Research; Mae Fah Luang University; Chiang Rai 57100; Thailand
School of Science; Mae Fah Luang University; Chiang Rai 57100; Thailand; Center of Excellence in Fungal Research; Mae Fah Luang University; Chiang Rai 57100; Thailand
Fungi asexual morph helicosporous hyphomycetes saprobic fungi taxonomy

Abstract

A new lignicolous freshwater species of Helicosporium exhibiting an asexual morph was isolated from submerged woody substrates collected in Guizhou Province, China. Phylogenetic analyses based on a combined LSU, ITS, tef1-ɑ, and rpb2 sequences data revealed that the isolates form a well-supported, distinct lineage within Helicosporium. Morphological comparisons further showed a unique combination of characters, including macronematous, unbranched conidiophores, monoblastic or polyblastic conidiogenous cells with denticulate or bladder-like protrusions, and helicoid, aseptate, guttulate, hyaline conidia, distinguishing the fungus from currently known congeners. Based on the concordance of morphological and phylogenetic evidence, the collections are introduced herein as a new species of Helicosporium. Detailed descriptions, illustrations, notes, and phylogenetic analyses are provided to support its taxonomic placement.

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How to Cite

Xiao, X.-J., Liu, X.-F., Liu, H.-X., Lu, Y.-Z., Xiao, Y.-P., Hyde, K.D. & Jayawardena, R.S. (2026) A new lignicolous freshwater fungus, Helicosporium (Tubeufiaceae, Tubeufiales) from Guizhou Province, China. Phytotaxa 772 (1): 66–76. https://doi.org/10.11646/phytotaxa.772.1.5