Description is provided of a new heterobasidiomycetous genus, Cystofilobasidium, based on Rhodosporidium capitatum. The genus is characterized by teliospores which give rise to filobasidiaceous basidia, sessile primary basidiospores which remain attached to the basidium, and a yeast phase developing from buds produced by the primary spores. Two species formerly placed in Rhodosporidium are transferred to Cystofilobasidium; these are C. bisporidiis (Fell, Hunter and Tallman) Oberw. and Bandoni comb, nov., and C. capitatum (Fell, Hunter and Tallman) Oberw. and Bandoni, comb. nov.
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