Basionym Name:Placodium ferruginosum Tuck., Proc. Amer. Acad. Arts & Sci. 12: 171 (1877)
Homotypic synonyms:Callopisma ferruginosum (Tuck.) Malme, Ark. Bot. 20A(no. 2): 36 (1926)Caloplaca ferruginosa (Tuck.) Zahlbr., Cat. Lich. Univers. 7: 125 (1930)Caloplaca ferruginosa f. ferruginosa (Tuck.) Zahlbr., Cat. Lich. Univers. 7: 125 (1930)Lecidea ferruginosa (Tuck.) Hue, Nouv. Arch. Mus. Hist. Nat., Paris, 5 sér. 4: 13 (1914)