Phaeoisaria bailongtanensis, P. magnoliicola and P. qujingensis spp. nov. (Pleurotheciaceae, Pleurotheciales) from Yunnan, China, with an augmented description of Phaeoisaria clematidis

Four phaeoisaria-like taxa were collected from decaying wood in Yunnan, China. Morphological examinations and phylogenetic analyses based on combined ITS, LSU, SSU, and rpb2 sequence data strongly support the recognition of the three new species, Phaeoisaria bailongtanensis , P. magnoliicola and P. qujingensis within Phaeoisaria s.str. and confirm the occurrence of P. clematidis in Yunnan Province. Following re-examination of the original collections of P. clematidis from Germany, a lectotype and an isolectotype are designated for this species, and our fresh collection is designated as a reference specimen. Detailed comparisons with morphologically similar and phylogenetically related species are provided to highlight the distinctiveness of the new taxa. In addition, an updated phylogenetic tree of Phaeoisaria is presented to further clarify interspecific relationships within the genus.