Porodaedalea chinensis (Hymenochaetaceae, Basidiomycota) – a new polypore from China

Abstract

Porodaedalea chinensis is described and illustrated as a new species occurring on Pinus yunnanensis from southwestern China based on morphological and molecular characters. Phylogenetic analyses of the combined internal transcribed spacer (ITS) of ribosomal RNA gene and translation elongation factor 1-alpha (tef1-α) sequences show that the new species forms a distinct lineage separating it from other Porodaedalea species. P. chinensis is characterized by perennial, pileate basidiocarps, relatively small pores (2-3 per mm), a dimitic hyphal system with generative hyphae bearing simple septa which are frequent in trama and skeletal hyphae dominant in context and trama, broadly ellipsoid, hyaline, thin-to slightly thick-walled, smooth, moderately cyanophilous basidiospores measured as 4-6 × 3-4.8 µm, and having a distribution in southwestern China.