On Papulaspora and bulbilliferous basidiomycetes Burgoa and Minimedusa

Abstract

It is proposed that Papulaspora Preuss be restricted to fungi producing papulaspores, which are defined as thallodic propagules differentiated almost from inception into central and sheathing cells. Exclusion from Papulaspora is recommended for species such as P. acinosa (Berk. & Curt.) Hughes, P. Candida Sacc., and others whose propagules differ from papulaspores in development and final structure. Bulbils are distinguished as homogeneous throughout development and pseudoparenchymatous at least at maturity. These are the vegetative propagules of basidiomycetous fungi segregated from Papulaspora into Burgoa Goidànich (lectotype species B. verzuoliana Goid.), several species of which are known to produce perfect states determinable as Sistotrema brinkmannii aggr., and Minimedusa Weres. & LeClair gen. nov. (type species P. polyspora Hots.), for which no perfect state is known.