Morphological and phylogenetic analyses reveal Xenosporidesmiaceae fam. nov, with seven Xenosporidesmium species

By

Liu, Ling-Ling
Gu, Xiao-Feng
Gou, Jiu-Lan
Liu, Zuo-Yi
Chen, Yaya
Wu, Jia-Hai
Liu, Yongxiang

Type

Article

Date of Publication

2025-10-13

Original Publication

MycoKeys

Volume

123

Pages

171--188

Subjects

3 new taxa , asexual morph , Phylogeny , Sordariomycetes , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.123.164006

 

Abstract

This study introduces a new family, Xenosporidesmiaceae, and describes a novel genus, Xenosporidesmium, along with a new species, Xenosporidesmium caohaiense, based on morphological and phylogenetic analyses. Multi-locus phylogenetic reconstruction (LSU, SSU, ITS, and rpb2) revealed that the new family forms a distinct clade, diverging from Sporidesmiales and Distoseptisporales in Sordariomycetes, and supporting its taxonomic independence. The new species, X. caohaiense, is characterized by dark brown conidiophores and pale brown, distoseptate conidia with mucilaginous sheaths. Additionally, six previously described Sporidesmium species are reclassified into Xenosporidesmium. This study emphasizes the significance of molecular data in resolving taxonomic ambiguities among morphologically similar but phylogenetically divergent fungi, thereby contributing to the understanding of freshwater fungal diversity.