Morphological and molecular identification for four new species of wood-inhabiting Trechispora (Basidiomycota, Hydnodontaceae) from Yunnan-Guizhou Plateau, East Asia

Abstract

Abstract Four new wood-inhabiting fungi, Trechispora albofarinosa, T. rhizomorpha, T. stipitata and T. wenshanensis spp. nov., are proposed based on a combination of morphological features and molecular evidence. Trechispora albofarinosa is characterized by the farinosa basidiomata with flocculence hymenial surface, a monomitic hyphal system with clamped generative hyphae, and ellipsoid, warted basidiospores. Trechispora rhizomorpha is characterized by the membranous basidiomata with odontioid hymenial surface, rhizomorphic sterile margin, barrelled basidia and subglobose to broad ellipsoid, smooth basidiospores. Trechispora stipitata is characterized by the solitary or imbricate, laterally stipitate basidiomata, fan shaped pileus, radially striatecovered the surface with appressed scales, odontioid hymenophore surface, and subglobose to broad ellipsoid, thin-walled, smooth basidiospores. Trechispora wenshanensis is characterized by a cottony basidiomata with a smooth hymenial surface, and ellipsoid, thin-walled, warted basidiospores. Sequences of ITS, nLSU, mt-SSU, GAPDH, RPB1, RPB2 markers of the studied samples were generated and phylogenetic analyses were performed with the maximum likelihood, maximum parsimony, and Bayesian inference methods. The phylogenetic tree inferred from the ITS sequences and the topology ITS + nLSU + mt-SSU + GAPDH + RPB1 + RPB2 dataset highlighted that four new species were grouped into the genus Trechispora.