Abstract
ABSTRACT Asterostroma roseoalbum sp. nov. was found in Yunnan Province, China, is described here as a new species based on its morphology and phylogeny. Asterostroma roseoalbum is characterised by its felted-membranous to pellicular, fimbriate basidiomata with a smooth hymenophore and a dimitic hyphal system bearing generative hyphae with simple-septate and echinulate, subglobose to globose basidiospores measuring as 8–9.5 × 7–9 µm. Phylogenetic analyses of the new species were based on the internal transcribed spacer (ITS) and large subunit (nrLSU) of ribosomal DNA (rDNA) sequences. The phylogenetic analysis indicated that the new species belongs to the genus Asterostroma, and is closely related to two species A. macrosporum and A. muscicola. A full description, illustrations and phylogenetic analysis results of the new species are provided. Furthermore, a key to the genus Asterostroma in China is provided.
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