Basionym Name:Urobasidium rostratum Giesenh., Flora, Regensburg 76: 139 (1893)
Homotypic synonyms:Zygosporium rostratum (Giesenh.) Bunting & E.W. Mason, Annotated Acct of Fungi rec'd I.M.I. 2(Fasc. 3): 143 (1941)