Morphological and molecular evidence for three new species of Coltricia (Hymenochaetaceae, Basidiomycota) from southern China

Three new species of Coltricia from southern China are described on the basis of morphological characters and molecular analyses. Phylogenetic analyses based on nuc rDNA ITS1-5.8S-ITS2 and partial 28S rDNA, and partial sequences of genes for RNA polymerase II subunits 1 and 2 confirmed the generic placement of the three new species. Coltricia lateralis is characterized by small, laterally stipitate basidiocarps, obtuse pileus margin, cinnamon-buff to honey yellow pore surface, and broadly ellipsoid basidiospores that measure 7-8 × 5-6 µm. Coltricia rigida is characterized by large, woody-hard fan-shaped basidiocarps, small pores (7-8 per mm), presence of septate sclerified hyphae, and subglobose to globose basidiospores that measure 6-7 × 5-6.5 μm. Coltricia wenshanensis is characterized by centrally stipitate basidiocarps, a distinctly concentrically zonate and sulcate pileal surface, large pores (0.5-2 per mm), and broadly ellipsoid to subglobose basidiospores that measure 7.5-8 × 6-7 µm.