A new section and species of Agaricus subgenus Pseudochitonia from Thailand

By

He, Maoqiang
Chuankid, Boontiya
Hyde, Kevin D
Cheewangkoon, Ratchadawan
Zhao, Rui-Lin

Type

Article

Date of Publication

2018

Original Publication

NeoBiota : advancing research on alien species and biological invasions

Volume

40

Pages

53-67

Subjects

Agaricaceae , new taxa , Phylogeny , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sophia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/mycokeys.40.26918

 

Abstract

A large species diversity has recently been discovered in the genus Agaricus. Six subgenera and 23 sections are now recognised. In this study, three specimens collected from Thailand, formed a monophyletic clade in subgenus Pseudochitonia, based on analyses of ITS sequence data. Further analyses, based on multi-gene sequence data (ITS, LSU, tef1-α), using BEAST, revealed that this clade originated 26.7 Ma. According to their distinct morphological characteristics, phylogenetic position and relatively old divergence time, a new section Cymbiformes is proposed and this section is represented by a new species A.angusticystidiatus. This new section is characterised by the strong iodoform odour of basidiomes and cymbiform basidiospores. Descriptions, colour photographs and illustrations are presented.