Terrestriporiaceae fam. nov., a new family of Russulales (Basidiomycota)

Abstract

A new family of Russulales, Terrestriporiaceae fam. nov. is proposed based on the combination of molecular and morphological data, and it is typified by Terrestriporia gen. nov. The phylogenetic analyses inferred from the combined dataset of five genes, including ITS, nLSU, RPB1, RPB2 and TEF1, show that Terrestriporia alba sp. nov. forms a monophyletic lineage within Russulales. The Bayesian evolutionary analysis on two datasets of RPB1 and RPB2 sequences indicate an ancient divergence of the new family from Albatrellaceae during the Cretaceous (124.68±0.39 Mya). The new family is characterized by annual and resupinate basidioma, poroid hymenophore, a monomitic hyphal structure, and generative hyphae mostly simple septate, but occasionally having clamp connections, the presence of gloeoplerous hyphae and cystidioles, thin-walled, hyaline, smooth, amyloid and acyanophilous basidiospores.