Prosthemium Kunze, Mykologische Hefte (Leipzig) 1: 17 (1817).
MycoBank number: MB 9534; Index Fungorum number: IF 9534; Facesoffungi number: FoF 06431; 8 morphological species (Species Fungorum 2020), 7 species with molecular data.
Type species – Prosthemium betulinum Kunze.
Notes – Prosthemium is the asexual morph of Pleomassaria (Hantula et al. 1998, Hyde et al. 2013, Wijayawardene et al. 2014a). The genus is characterized by globose to subglobose conidiomata, with circular ostioles and brown euseptate conidia with distinct central cell (Tanaka et al. 2010). Sexual morph of this genus is characterized with medium- to large sized ascomata, cellular pseudoparaphyses, clavate to oblong asci and large and muriform ascospores (Barr 1982, Sivanesan 1984). The genus includes saprobes from terrestrial and temperate climatic regions. Seven Prosthemium species were resolved using combined gene analysis of ITS, LSU and tub sequence data available in the GenBank (Ariyawansa et al. 2016). For morphology of type species, see Tanaka et al. (2010).