Hemiaustroboletus, a new genus in the subfamily Austroboletoideae (Boletaceae, Boletales)

By

Ayala Vàsquez, Olivia
García-Jiménez, Jesús
Aguirre-Acosta, Elvira
Castro- Rivera, Rigoberto
Angeles-Argaiz, Rodolfo Enrique
Saldivar, Angel Emmanuel
Garibay-Orijel, Roberto

Type

Article

Date of Publication

2022-3-30

Original Publication

MycoKeys

Volume

88

Pages

55--78

Subjects

Mexico , mycodiversity , Neotropics , new taxa

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers 2011-

Identifiers

DOI: https://doi.org/10.3897/mycokeys.88.73951

 

Abstract

The present study describes Hemiaustroboletusgen. nov. in the subfamily Austroboletoideae (Boletaceae). Hemiaustroboletus is supported by morphological and molecular data using LSU and RPB2 regions. Additionally, its geographic distribution and intraspecific variation were inferred using ITS sequences. The genus is characterised by pileate-stipitate basidiomata; purple, brown, reddish-brown, orange-brown to dark brown vinaceous pileus; whitish or lilac to vinaceous context and a subclavate stipe. Microscopically, it is characterised by ornamented, slightly verrucose, cracked to perforated brown basidiospores. Two species are described within the genus, Hemiaustroboletus vinaceobrunneussp. nov. and H. vinaceussp. nov.Hemiaustroboletus vinaceussp. nov. is morphologically similar to Austroboletus gracilis, which suggests they may have been confused in the past. This study presents the phylogenetic placement, microscopic structures, detailed morphological descriptions and illustrations of both new species.