Changbai wood-rotting fungi 16. A new species of Fomitopsis (Fomitopsidaceae)

Fomitopsis niveomarginata sp. nov. is described and illustrated from specimens originating from Changbaishan Nature Reserve, Jilin Province, northeastern China. It is characterized by annual to perennial, sessile to effused-reflexed basidocarps, with a cream-colored azonate and corky context, a yellowish brown and shining pore surface, and small, oblong-ellipsoid basidiospores. The new species is similar to Fomitella rhodophaea that has a concentrically sulcate and zoned pileal surface, smaller pores, and slightly wider basidiospores; furthermore, the latter occurs mainly in the tropical areas. Phylogenetically, the new species forms a well-supported, terminal monophyletic clade, distinct from other sampled Fomitopsis species and Fomitella rhodophaea. An identification key to the Chinese species of Fomitopsis is provided.