Morphology, multilocus phylogeny, and toxin analysis reveal two new species of Amanita section Amanita (Amanitaceae) from China

By

Su, Yu-Ting
Xu, Fei
Zhang, Ping
Deng, Peng-Tao
Lai, Meng-Meng
Chen, Zuohong

Type

Article

Date of Publication

2025-6-9

Original Publication

MycoKeys

Volume

118

Pages

225--244

Subjects

Ibotenic acid , Morphology , Muscimol , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.118.141080

 

Abstract

Globally, many species of Amanita sect. Amanita (Amanitaceae, Agaricales) cause poisoning after consumption. Amanita flavomelleicepssp. nov. and Amanita parvisychnopyramissp. nov., two new species of A. section Amanita from China, are described here. Morphology and molecular phylogenetic analyses based on five genes (ITS, nrLSU, RPB2, TEF1-α, and TUB2) revealed these two taxa as distinct species. Amanita flavomelleicepssp. nov. is characterized by a yellowish-to-yellow pileus covered by verrucose volval remnants; a subglobose basal bulb with shortly limbate; subglobose to broadly ellipsoid, inamyloid basidiospores. Amanita parvisychnopyramissp. nov. is characterized by a brownish pileus covered by subconical volval remnants; an ovate basal bulb with a cream limbate; and subglobose-to-broadly ellipsoid, inamyloid basidiospores. Screening for the most notorious toxins by liquid chromatography tandem mass spectrometry (LC-MS/MS) revealed the presence of ibotenic acid (IBO) and muscimol (MUS) in A. parvisychnopyramis and the absence of these toxins in A. flavomelleiceps.