Three new species of and (Agaricales, Basidiomycota) from Northwestern China.

Members of the genera and are vital for litter decomposition in tropical and humid temperate forests. In this study, the difference in morphological features among , , and was confirmed by DNA data. and showed separate relationships with other species in the ITS and nLSU combined dataset utilized for the phylogeny of sect. . In addition, is characterized by pileus honey yellow at the center, margin pinkish buff to buff, stipe pinkish buff to fuscous, and basidiospores elliptic to briolette. is characterized by pileus clay buff to grayish brown at the center, margin pinkish buff to fawn, stipe dark brown to fuscous, and basidiospores elliptic. Based on the combined dataset of the ITS and TEF-1α, has been detected as a separate lineage in the phylogenetic studies of sect. . The ecological behaviors of the new species are described with illustrations.