Cat. Lich. Univers. 7: 1 (1930) [1931]. Basionym: Lichen calvus Dicks., Fasc. Pl. Crypt. Brit. (London) 2: 18 (1790).
Basionym: Lichen calvus Dicks., Fasc. Pl. Crypt. Brit. (London) 2: 18 (1790).