Phylogenetic and morphological studies in (Hymenochaetales, Basidiomycota) with the addition of four new species.

(Hymenochaetales, Basidiomycota) is the largest segregate genus of s.l. Based on molecular and morphological data, 77 species are accepted in to date. Phylogenetic analyses of ITS and 28S sequences, including 38 new ITS and 20 28S sequences of species, revealed four species new to science. The new taxa , , and from Taiwan, Nepal, Réunion, Belize, and USA are described and illustrated. In addition, species concepts for from New Zealand and from U.S.A. are revised and the new name is proposed. Phylogenetic analyses of the ITS region placed , and in a strongly supported clade and demonstrated that they are conspecific. and are synonymised under based on morphological and sequence data. The following new combinations are proposed: , , , , and . Line drawings of , , and , as well as photographs of basidiomata, are provided. A key to and similar species is presented.