Morphological and molecular identification for two new wood-inhabiting species of Botryobasidium (Basidiomycota) from China

By

Li, Xin
Zhang, Xin
Sun, Yi-Fei
Li, Zhen-Hao
Zhu, An-Hong
Wu, Ying-Da

Type

Article

Date of Publication

2025

Original Publication

MycoKeys

Volume

116

Pages

73--89

Subjects

Botryobasidiaceae , new species , Phylogeny , taxonomy , wood-rotting fungi

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.116.143594

 

Abstract

The wood-inhabiting fungi refer to large basidiomycetes that grow on various woody materials and are distributed in various forest ecosystems, some of which have important economic value. In the present study, two new resupinate, adnate, wood-inhabiting fungal taxa, Botryobasidium latihyphum and B. zhejiangensis, are introduced based on morphological and molecular characteristics. A molecular phylogenetic study based on sequence data from the internal transcribed spacers (ITS) and the large subunit (nLSU) regions supported the two new species in the genus Botryobasidium. Maximum likelihood (ML), maximum parsimony (MP), and Bayesian inference (BIBI) were employed to perform phylogenetic analyses of these datasets. The new species B. latihyphum is characterized by its cream hymenial surface when fresh, olivaceous buff when dry, a monomitic hyphal system with clamp connections, the presence of clavate to tubular cystidia, basidia with six sterigmata, and broadly oval basidiospores measuring 7.9–10.2 × 3.2–4.3 μm. Botryobasidium zhejiangensis sp. nov. is characterized by its white to buff-yellow hymenial surface when fresh, cream when dry, a monomitic hyphal system with clamp connections, lacking cystidia, basidia with six sterigmata, and broadly navicular basidiospores measuring 7.9–9.2 × 2.6–3.4 μm. The phylogenetic result inferred from ITS + nLSU sequence data revealed that B. latihyphum is closely related to B. vagum, B. laeve, B. subincanum, and B. incanum, while B. zhejiangensis is closely related to B. leptocystidiatum, B. subcoronatum, B. xizangense, and B. intertextum.