Three independent evolutionary events of sequestrate species in Australasia.

Three Australian species with sequestrate basidiome forms are recorded for the first time in the genus based on nuclear ITS-LSU and morphological data. These species represent three rare independent evolutionary events resulting in sequestrate basidiomes arising from agaricoid species in three different sections in two subgenera. All three species have highly reduced basidiome forms, and no species with intermediate forms have been found. is unique in the genus in having highly branched, dendritic terminal elements in the pileipellis. We provide full descriptions of two species: (= .) in subg. sect. , and . in subg. sect. . A reduced description is provided for the third, KV181 in subg. sect. , as it is currently known from a single sequence.