Abstract
A new species, Daedaleopsis hainanensis, is described and illustrated from Hainan Province, tropical China. It is characterized by annual, sessile, flabelliform, dimidiate or semicircular basidiocarps with a glabrous, more or less yellowish-brown and concentrically sulcate pileal surface, a rose to pink margin of pore surface when fresh, round pores, presence of dendrohyphidia and hyphal pegs in the hymenium, and allantoid to cylindrical basidiospores 6–8 × 1.7–2.2 µm. The identification of the new species was supported by the phylogenetic analyses based on a combined 4 gene dataset (ITS, nLSU, rpb1, rpb2) of five species of Daedaleopsis.