Basionym Name:Placodium bicolor Tuck., Bull. Torrey bot. Club 6: 57 (1875)
Homotypic synonyms:Lecanora bicolor (Tuck.) Zahlbr., Cat. Lich. Univers. 5: 665 (1928)Placopsis bicolor (Tuck.) B. de Lesd., Annals Cryptog. Exot. 4(2): 100 (1931)