Updated description of Atheniella (Mycenaceae, Agaricales), including three new species with brightly coloured pilei from Yunnan Province, southwest China.

Yupeng Ge,Xianhao Cheng,Zewei Liu,Qin Na,Hui Zeng

doi:10.3897/mycokeys.81.67773

Abstract

An updated description of the genus Atheniella, combining macro- and micromorphological characters that elaborate on the original generic characterisation, is presented. Atheniella is characterised by a brightly coloured pileus, all tissues inamyloid and pileipellis covered with simple to branched excrescences. Previously, nine Atheniella species were known globally, of which three species were accepted in China. Three newly-recognised species classified in the genus are here formally described from Yunnan Province: Atheniella flavidasp. nov., A. rutilasp. nov. and A. taoyaosp. nov. The new species are characterised by a yellow, orange, pink or red pileus, fusiform cheilocystidia and pleurocystidia, non-smooth pileipellis, stipitipellis smooth or with cylindrical ornamentation, caulocystidia fusiform or subglobose, if present and all tissues inamyloid. Morphological descriptions, photographs, line drawings and comparisons with closely-related taxa are presented for the new species. A phylogenetic analysis of sequence data for the rDNA internal transcribed spacer region and nuclear large ribosomal subunit (ITS + nLSU) supported that Atheniella is resolved as monophyletic and also supported the taxonomic recognition of the new species. A key to the 12 species of Atheniella is also provided.

Highlights

The genus Atheniella Redhead, Moncalvo, Vilgalys, Desjardin & B.A
Given the change in taxonomic rank, formalisation of new combinations in Atheniella was required for species formerly classified in Mycena sect
Nine taxa were recognised in Atheniella, comprising three new species and six new combinations, of which Atheniella adonis (Bull.) Redhead, Moncalvo, Vilgalys, Desjardin & B.A

Summary

Introduction

The genus Atheniella Redhead, Moncalvo, Vilgalys, Desjardin & B.A. Perry is a small mycenoid genus, formerly treated as Mycena (Pers.) Roussel sect. Adonideae (Grgurinovic 2003; Redhead et al 2012; Aravindakshan and Manimohan 2015; Gminder and Böhning 2016; Lehmann and Lüderitz 2018, 2019). Nine taxa were recognised in Atheniella, comprising three new species and six new combinations, of which Atheniella adonis (Bull.) Redhead, Moncalvo, Vilgalys, Desjardin & B.A. Perry is the type species (Grgurinovic 2003; Redhead et al 2012; Aravindakshan and Manimohan 2015; Gminder and Böhning 2016; Lehmann and Lüderitz 2018, 2019). An infrageneric classification for Atheniella has not been proposed since the genus was established (Redhead et al 2012)

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