Phylogeny and species diversity of the genus with emphasis on eighteen new species from China.

is a widespread, frequently encountered fungal group appearing in forests, but the species diversity and molecular phylogeny of in China remains incompletely understood. In this work, we performed comprehensive phylogenetic analyses using multilocus sequence data. Six datasets were employed, including a five-locus concatenated dataset (ITS, nrLSU, , a two-locus concatenated dataset (ITS, nrLSU), and four single-locus datasets (ITS) that were divided based on the four different phylogenetic clades of recognized in this study. A total of I 946 sequences were used, of which 713 were newly generated, including 170 sequences of ITS, 174 sequences of nrLSU, 131 sequences of , 107 sequences of and 131 sequences of The phylogeny based on the five-locus concatenated dataset revealed that . is monophyletic and four phylogenetic clades are clearly recognized, clade, clade, clade, and clade. A total of 24 lineages or subclades were recognized, II of which were new, the remaining 13 corresponding with previous studies. Chinese species are distributed in 22 lineages across four clades. Phylogenetic analyses based on the two-locus concatenated dataset and four single-locus datasets confirmed the presence of at least 93 phylogenetic species in China. Among them, 58 are identified as known species, including a species with a newly designated lectotype and epitype, 18 are newly described in this paper, and the remaining 17 taxa are putatively new to science but remain unnamed due to the paucity or absence of ascomatal materials. In addition, the species previously recorded in China are discussed. A list of 76 confirmed species, including newly proposed species, is provided. The occurrence of and are not confirmed although both are commonly recorded in China. Mao N, Xu YY, Zhang YX, Zhou H, Huang XB, Hou CL, Fan L (2023). Phylogeny and species diversity of the genus with emphasis on eighteen new species from China. : 111-152. doi: 10.3114/fuse.2023.12.08.