Basionym Name:Placodium muelleri Vain., [as 'mülleri'] Acta Soc. Fauna Flora fenn. 7(no. 1): 120 (1890)
Homotypic synonyms:Callopisma muelleri (Vain.) Malme, [as 'mülleri'] Ark. Bot. 20A(no. 9): 16 (1926)Caloplaca muelleri (Vain.) Zahlbr., Cat. Lich. Univers. 7: 248 (1931)Squamulea muelleri (Vain.) Wilk & Lücking, IMA Fungus 15(no. 9): 36 (2024)