Morphological characteristics and phylogenetic analyses revealed four new species (Basidiomycota) in the Yunnan-Guizhou Plateau, China
Four new fungi, viz. Clavulinopsis wumengshanensis (Clavariaceae, Agaricales), Henningsomyces bambusae (Porotheleaceae, Agaricales), Xenasma bisterigmatae, 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 Clavulinopsis wumengshanensis sp. nov. groups with C. aurantiocinnabarina, Henningsomyces bambusae sp. nov. forms a sister group with H. candidus, Xenasma bisterigmatae 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. Clavulinopsis wumengshanensis 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); Henningsomyces bambusae 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); Xenasma bisterigmatae 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).
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