Saxicolous species of Claudopus (Agaricales, Entolomataceae) from Australia

Claudopus rupestris, C. viscosus, and C. minutoincanus are described as new to science. All three species produce abundant, white basidiomata on the underside of granitic rocks and have a pileus that is sticky to the touch. Claudopus rupestris has unusual basidiospores, some of which are 4-angled. Claudopus viscosus and C. minutoincanus possess subcapitulate to capitulate pileocystidia and are morphologically similar to Entoloma jahnii of Europe.