A new section and species of Agaricus subgenus Pseudochitonia from Thailand

© 2018 Pensoft Publishers. All rights reserved. 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 ana...

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Bibliographic Details
Main Authors: Mao Qiang He, Boontiya Chuankid, Kevin D. Hyde, Ratchadawan Cheewangkoon, Rui Lin Zhao
Format: Journal
Published: 2018
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Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85054026311&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/62511
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Institution: Chiang Mai University
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Summary:© 2018 Pensoft Publishers. All rights reserved. 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.