Basionym Name:Callopisma crassum Malme, Ark. Bot. 20A(no. 9): 16, 43 (1926)
Homotypic synonyms:Caloplaca crassa (Malme) Zahlbr., Cat. Lich. Univers. 7: 226 (1931)Rusavskia crassa (Malme) S.Y. Kondr. & Kärnefelt, Ukr. bot. Zh. 60(4): 433 (2003)