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

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.

Broadening the Knowledge of Mexican Boletes: Addition of a New Genus, Seven New Species, and Three New Combinations

“…In the last five years, a number of new species of Boletaceae from Mexico have been described, demonstrating the great and unexplored diversity of this fungal group in the country [2,39,40,48,52,84]. Additionally, recently new genera have been described world-wide [13,27,34], for example, Cacaoporus [66], and others remain obscure, including genera belonging to the subfamily Leccinoideae [14,15].…”

“…Description: pileus: 19-28 (40) mm in diameter, convex, dark yellow (4C8) to orange (7A3) when young, cinnamon and orange-brown (7C8) to brown (7D8-7E8) when mature, furfuraceous, dry, incurvate margin. Hymenophore: adhered, with pores of 0.25-0.5 mm in diameter, circular, whitish.…”

Boletaceae in China: Taxonomy and phylogeny reveal a new genus, two new species, and a new record

“…Although remarkable results on the taxonomy of boletes were obtained in the past ( Li et al, 2011 ; Zeng et al, 2014 ; Zhao et al, 2014a , b ; Gelardi et al, 2015a , b ; Zhu et al, 2015 ; Wu et al, 2016b ; Chen et al, 2019 ; Vadthanarat et al, 2019 ; Hosen and Yang, 2021 ; Ayala-Vásquez et al, 2022 ; Badou et al, 2022 ; Biketova et al, 2022 ), the additions of more new taxa are necessary to reconstruct a high-resolution tree of Boletaceae. More intensive collection are needed to analyze the species diversity of Boletaceae in China.…”