Vamsapriya pseudosasae sp. nov. (Vamsapriyaceae, Xylariales): A Synnematous Bambusicolous Hyphomycete from Guangdong Province, China

Vamsapriya species are primarily associated with bamboo substrates in Asian countries, including China. However, they have not been thoroughly investigated in Guangdong Province, where a high diversity of bambusicolous fungi has been discovered. In this study, a new species, Vamsapriya pseudosasae , was isolated from decaying culms of Pseudosasa japonica (Poaceae) in Guangdong Province. The identification is based on multilocus phylogenetic analyses (SSU–ITS–LSU– rpb2 – tef1‐α – tub2 ) and morphological characteristics. Vamsapriya pseudosasae differs from its closely related species V. yadongensis in having ovoid, obovoid, irregular‐shaped, and dark brown to black conidia with a distinctly wider and darker septum. A morphological description and illustration of the holotype are provided, along with an updated phylogenetic analysis. In addition, the taxonomic problems between Diabolocovidia , Didymobotryum , and Vamsapriya are proposed and discussed. This study enhances the understanding of the diversity and geographical distribution of bambusicolous fungi in China and establishes a more robust phylogenetic framework for Xylariales species.