Sidera, a new genus in Hymenochaetales with poroid and hydnoid species

A new genus, Sidera (Hymenochaetales), is described to accommodate the dimitic polypores Skeletocutis lenis and S. vulgaris, the monomitic polypore Ceriporiopsis lowei, and the monomitic, hydnoid Athelopsis lunata. The genus is characterised by white-rot, whitish resupinate fruiting bodies, crystal rosettes on specialised hyphae, and allantoid spores. Cinereomyces (Polyporales) is confirmed to be a good genus including C. lindbladii, separate from Diplomitoporus as defined by its type species D. flavescens and the closely related D. crustulinus. Fabisporus is a taxonomic synonym of Diplomitoporus. Poriodontia subvinosa belongs to the Hymenochaetales.