Three new species of Pholiotina (Bolbitiaceae, Agaricales) from China.

In this study, maximum likelihood and Bayesian inference phylogenetic trees were reconstructed for Pholiotina based on the phylogenetic framework of the genus established by Song and Bau and on a concatenated dataset of internal transcribed spacer (ITS), nuclear large subunit ribosomal DNA (28S), and translation elongation factor 1-alpha (tef1-α) sequences. The phylogenetic trees resolved Pholiotina into two monophyletic clades: one containing sect. Pholiotina and the other comprising sect. Vestitae together with sect. Intermediae. The infrageneric subdivision of the genus was also reviewed, and the taxonomic issues that remain to be addressed were proposed. By further integrating morphological evidence, three new species of Pholiotina were discovered from Jilin Province and the Xizang Autonomous Region: P. constrictibasidiata (characterized by basidia with a median constriction), P. raribasidiata (notable for its rare basidia and basidiospores), and P. jilinensis (distinguished by the absence of pileocystidia and germ pores, with its type locality in Jilin City). In addition, this study provides an identification key to the new species, together with morphological descriptions and line drawings.