Abstract
This study introduces a new species, Lasiobelonium sublanceolatum H.L. Su, K.D. Hyde & Q. Zhao, collected from Yunnan Province, China. This species differs from other members of Lasiobelonium Ellis & Everh. in the morphological characters of its hairs, paraphyses, asci, and ascospores. Phylogenetic analyses based on the combined internal transcribed spacer (ITS), nuclear ribosomal large subunit (LSU) and the two largest subunits of RNA polymerase II ( RPB1 and RPB2 ) sequences of Solenopeziaceae Ekanayaka & K.D. Hyde also support its recognition as a distinct species, sister to the clade including Las. belanense and Las. lonicerae . This study provides illustrations, detailed descriptions, phylogenetic relationships, and a comparative table summarizing the morphological characteristics of all reported Lasiobelonium species. Our findings increase the reported species diversity of Lasiobelonium and provide baseline data for understanding the discomycete diversity in Yunnan Province, China.