Diversity of Distoseptispora (Distoseptisporaceae) taxa on submerged decaying wood from the Red River in Yunnan, China

Abstract

The Red River Basin is located in the Indo-Burma biodiversity hotspot and is rich in lignicolous freshwater fungi, but no systematic research has been conducted. A systematic study on the species diversity of lignicolous freshwater fungi in the basin is ongoing. Seven distoseptispora-like specimens were collected from the Red River Basin in Yunnan. Phylogenetic analysis of ITS, LSU, tef1-α, and rpb2 genes and combined morphological data indicate that there are six distinct species of Distoseptispora, including two new species and four known species. Two new species were named D. suae and D. xinpingensis, and the four known species were D. bambusae, D. euseptata, D. obpyriformis and D. pachyconidia. This study provides detailed descriptions and illustrations of these six species and an updated phylogenetic backbone tree of Distoseptispora.

Multi-gene phylogenetic analyses revealed two novel species and one new record of Trichobotrys (Pleosporales, Dictyosporiaceae) from China

“…The differences among the holotype and our new collections suggest that factors such as habitat and incubation time may influence the size of conidia and conidiophores. Similar observations have also been discovered in the asexual morph of other fungal species ( Yang et al 2018b ; Zhang et al 2022 ; Shen et al 2024 ). Owing to the unavailable molecular sequences in the holotype of T. effusa and the deficiency of morphological descriptions about T. effusa FS524 and T. effusa YMJ1179, the possibility cannot be excluded that our new isolates are a different species to T. effusa .…”