Abstract
Dendryphiella is an asexual morph genus placed in the family Dictyosporiaceae. During our study on brown-spored hyphomycetes, a new taxon D. fasciculata was found on decaying wood collected in Chiang Mai Province, Thailand. The new species is characterized by mononematous, fasciculate conidiophores with polytretic, terminal and intercalary conidiogenous cells. Conidia are fusiform to ellipsoidal, pale brown and aseptate when young, becoming brown or dark brown, verrucose and 3-septate when mature. The phylogenetic analysis of combined ITS and LSU sequence data showed that isolates of Dendryphiella form a well-supported clade in Dictyosporiaceae, and Dendryphiella fasciculata is phylogenetically distinct from other species. Dendryphiella fasciculata is therefore introduced here with a description and morphological illustrations. Taxonomic notes and a key to Dendryphiella species are provided.