Freshwater fungi in the karst plateau wetlands from Guizhou Province, China: taxonomic novelties in Melanommataceae (Pleosporales)

By

Liu, Ling-Ling
Liu, Yongxiang
Chen, Yaya
Gou, Jiu-Lan
Chi, Feng
Liu, Yi
Gu, Xiao-Feng
Wei, Quan-Quan
Zhang, Meng
Liu, Zuo-Yi
Zhou, Si

Type

Article

Date of Publication

2025

Original Publication

MycoKeys

Volume

113

Pages

209--236

Subjects

Aquatic fungi , Ascomycota , four new taxa , Generic delimitation , molecular phylogeny

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.113.140684

 

Abstract

Three isolates of interest were collected during an investigation of freshwater fungi from wetlands in the karst regions of Guizhou Province, Southwest China. Phylogenetic analyses using ITS, LSU, SSU, and tef-1α gene regions have revealed the placements of these isolates in Melanommataceae (Pleosporales, Dothideomycetes). Based on the morphological and phylogenetic evidence, three new species are introduced: Byssosphaeria chishuiensissp. nov., Camposporium guizhouensesp. nov., and C. aquaticumsp. nov.Byssosphaeria chishuiensis is sister to B. villosa and forms a basal branch of Byssosphaeria within Melanommataceae. Byssosphaeria chishuiense is similar to B. villosa in ascal size but differs in the ascomata and ascospore sizes, and the ascospores lack appendages. Camposporium aquaticum is sister to C. guizhouense, and they form a distinct lineage within the genus. Morphologically, C. aquaticum resembles C. guizhouense in its conidial shape but differs in conidial size. Additionally, PHI analysis is performed to further reveal that C. aquaticum and C. guizhouense have no significant recombination with related taxa. Neobyssosphaeria is synonymized under Byssosphaeria, and accordingly, Byssosphaeria clematidiscomb. nov. is proposed to accommodate Neobyssosphaeria clematidis. The descriptions, illustrations, and notes of the novel taxa are provided along with an updated phylogenetic tree of Melanommataceae. Two synopses of the species in Byssosphaeria and Camposporium are also provided.