Two new species of Micropsalliota (Agaricales, Agaricaceae) from subtropical regions of China

By

Yan, Jun-Qing
Zeng, Zhi-Heng
Ya-Ping, Hu
Nie, Cheng-Feng
Ke, Bin-Rong
Wang, Sheng-nan
Zeng, Hui

Type

Article

Date of Publication

2025

Original Publication

MycoKeys

Volume

113

Pages

193--208

Subjects

Basidiomycetes , Phylogeny , taxonomy , two new taxa

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.113.140599

 

Abstract

Micropsalliota is a relatively small genus, with 97 names recorded in previous research. In this study, two new species of Micropsalliota, M. bispora and M. vulgaris, have been identified based on morphological and phylogenetic evidence from subtropical regions of China. Morphologically, M. bispora is characterized by very small basidiomata, cymbiform basidiospores up to 9.0 μm long, white to cream pileus with fawn to dull red center, and tibiiform cheilocystidia; M. vulgaris is recognized by small basidiomata, medium-sized spores, white to cream pileus, covered with reddish brown to dark brown fibrils, various cheilocystidia that are up to 60 μm long, and hyphae of fibrils exhibiting pale brown vacuolar pigmentation. Their distinct taxonomic status is confirmed by the positions of the two new species in 4-locus (ITS, LSU, rpb2, tef-1α) phylogenetic trees. Detailed descriptions and morphological photographs of two new species are presented. To aid in diagnosis, a key to 35 species of Micropsalliota in China is provided.