<i>Gloeocystidiellum sinense</i> sp. nov. (Stereaceae, Russulales), a wood‐inhabiting fungus from Yunnan Province, China

ABSTRACT A new corticioid fungal species Gloeocystidiellum sinense from Yunnan Province, is described and illustrated based on morphological and molecular evidence. This species is characterised by its cream to pink‐buff hymenial surface, a monomitic hyphal system, and ellipsoid basidiospores measuring as 3.7–4.4 × 2.8–3.2 µm. The phylogenetic analyses inferred from ITS + nLSU dataset indicated that the new species G. sinense nested within the genus Gloeocystidiellum , in which it formed a single lineage and grouped with G. porosum and G. yunnanense within the same clade. A full description, illustrations, and phylogenetic analysis results are provided. In addition, the new species is compared with closely related taxa.