Basionym Name:Didymium obducens P. Karst., Not. Sällsk. Fauna et Fl. Fenn. Förh. 9: 356 (1868)
Homotypic synonyms:Didymium crustaceum var. obducens (P. Karst.) Sacc., in Berlese, De Toni & Fischer, Syll. fung. (Abellini) 7(1): 379 (1888)