Sanghuangporus toxicodendri sp. nov. (Hymenochaetales, Basidiomycota) from China

Abstract

<i>Sanghuangporus toxicodendri</i> (Hymenochaetales) is described as new based on collections made from Shennongjia Forestry District, Hubei Province, China. All studied basidiocarps grew on living trunks of <i>Toxicodendron</i> sp. This new species is characterized by having perennial, effused-reflexed to pileate basidiocarps; pore surface brownish yellow or yellowish brown, pores 7-9 per mm; context 1-5 mm thick or almost invisible; setae ventricose, dark brown, 26-42 × 7-10 μm; basidia 4-sterigmate or occasionally 2-sterigmate; basidiospores broadly ellipsoid, smooth, brownish yellow, slightly thick-walled, mostly 3.5-4 × 2.8-3 μm. Maximum likelihood and Bayesian inference phylogenies inferred from internal transcribed spacer (ITS) region of rDNA indicated that <i>Sanghuangporus</i> spp. formed a monophyletic clade and resolved as a sister to <i>Tropicoporus</i> spp., and six strains of <i>S. toxicodendri</i> formed a monophyletic group which is sister to <i>S. quercicola</i>. An identification key to known species of <i>Sanghuangporus</i> is provided.