<i>Oncobasidium</i> : A new genus of tulasnelloid fungi.

Abstract

Oncobasidium theobromae Talbot &amp; Keane is described as a new genus and species of Basidiomycotina (Tulasnellales, Ceratobasidiaceae). This fungus occurs in the xylem and forms small corticioid fructifications on leaf-scars of cocoa (Theobroma cacao L.) showing dieback symptoms, in the Territory of Papua and New Guinea. Its affinities within the tulasnelioid fungi are discussed.