Outline, Divergence Times, and Phylogenetic Analyses of Trechisporales (Agaricomycetes, Basidiomycota)

Zhan-Bo Liu; Ying-Da Wu; Heng Zhao; Ya-Ping Lian; Ya-Rong Wang; Chao-Ge Wang; Wei-Lin Mao; Yuan Yuan

doi:10.3389/fmicb.2022.818358

Outline, Divergence Times, and Phylogenetic Analyses of Trechisporales (Agaricomycetes, Basidiomycota)

Front Microbiol. 2022 Apr 25:13:818358. doi: 10.3389/fmicb.2022.818358. eCollection 2022.

Authors

Zhan-Bo Liu¹, Ying-Da Wu^{1

2}, Heng Zhao¹, Ya-Ping Lian¹, Ya-Rong Wang¹, Chao-Ge Wang¹, Wei-Lin Mao¹, Yuan Yuan¹

Affiliations

¹ School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China.
² Key Laboratory of Forest and Grassland Fire Risk Prevention, Ministry of Emergency Management, China Fire and Rescue Institute, Beijing, China.

Abstract

Phylogenetic analyses inferred from the nuc rDNA ITS1-5.8S-ITS2 (ITS) data set and the combined 2-locus data set [5.8S + nuc 28S rDNA (nLSU)] of taxa of Trechisporales around the world show that Sistotremastrum family forms a monophyletic lineage within Trechisporales. Bayesian evolutionary and divergence time analyses on two data sets of 5.8S and nLSU sequences indicate an ancient divergence of Sistotremastrum family from Hydnodontaceae during the Triassic period (224.25 Mya). Sistotremastrum family is characterized by resupinate and thin basidiomata, smooth, verruculose, or odontoid-semiporoid hymenophore, a monomitic hyphal structure, and generative hyphae bearing clamp connections, the presence of cystidia and hyphidia in some species, thin-walled, smooth, inamyloid, and acyanophilous basidiospores. In addition, four new species, namely, Trechispora dentata, Trechispora dimitiella, Trechispora fragilis, and Trechispora laevispora, are described and illustrated. In addition, three new combinations, namely, Brevicellicium daweishanense, Brevicellicium xanthum, and Sertulicium limonadense, are also proposed.

Keywords: Hydnodontaceae; Trechispora; phylogenetic analysis; taxonomy; wood-rotting fungi.