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

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

JOURNAL=Frontiers in Microbiology

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.818358

DOI=10.3389/fmicb.2022.818358

ISSN=1664-302X

ABSTRACT=<p>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 <italic>Sistotremastrum</italic> 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 <italic>Sistotremastrum</italic> family from Hydnodontaceae during the Triassic period (224.25 Mya). <italic>Sistotremastrum</italic> 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, <italic>Trechispora dentata</italic>, <italic>Trechispora dimitiella</italic>, <italic>Trechispora fragilis</italic>, and <italic>Trechispora laevispora</italic>, are described and illustrated. In addition, three new combinations, namely, <italic>Brevicellicium daweishanense</italic>, <italic>Brevicellicium xanthum</italic>, and <italic>Sertulicium limonadense</italic>, are also proposed.</p>