Morphological characteristics and phylogenetic analyses revealed four new species (Basidiomycota) in the Yunnan-Guizhou Plateau, China.

Abstract

Four new fungi, viz. Clavulinopsiswumengshanensis (Clavariaceae, Agaricales), Henningsomycesbambusae (Porotheleaceae, Agaricales), Xenasmabisterigmatae, and X.guttulata (Xenasmataceae, Russulales), from Yunnan Province in China, are proposed, based on a combination of morphological features and molecular evidence. Phylogenetic analyses were conducted using a combined dataset of internal transcribed space and nuclear ribosomal RNA large subunit sequences. The ITS+LSU analysis showed that Clavulinopsiswumengshanensis sp. nov. groups with C.aurantiocinnabarina, Henningsomycesbambusae sp. nov. forms a sister group with H.candidus, Xenasmabisterigmatae sp. nov. is clustered with X.rimicola, and X.guttulata sp. nov. is clustered with X.pruinosum. The morphology and multi-gene phylogenetic analyses confirmed the placement of the four new taxa. Clavulinopsiswumengshanensis is distinguished by buff-yellow to straw-yellow basidiomata, clavate to subcylindrical basidia with four sterigmata, and subglobose basidiospores with several guttules (7-8.5 × 6-7.5 µm); Henningsomycesbambusae is characterized by white to cream basidiomata with short cylindric to tubular colonies, cylindrical to subcylindrical basidia with two sterigmata and globose to subglobose basidiospores (6.5-8.5 × 6.5-8.5 µm); Xenasmabisterigmatae can be characterized by its membranaceous and ash-grey basidiomata, clavate to subcylindrical basidia with two sterigmata and ellipsoid to subglobose basidiospores (10-12.5 × 8-10.5 µm); X.guttulata is distinguished by membranaceous and white to cream basidiomata, clavate to subcylindrical basidia with two sterigmata and ellipsoid to narrowly ellipsoid basidiospores (7-9 × 5.5-7.5 µm).