Basionym Name:Verrucaria dufourii var. orbicularis A. Massal., Ric. auton. lich. crost. (Verona): 175 (1852)
Homotypic synonyms:Involucrothele dufourii f. orbicularis (A. Massal.) Grummann, Cat. Lich. Germ. (Stuttgart): 15 (1963)Verrucaria dufourii f. orbicularis (A. Massal.) Szatala, in Degen, Flora Velebitica: 304 (1938)