Homotypic Synonyms See Note

Basionym Name:
Placidium michelii A. Massal., Sched. Crit. Lich. Exsicc. (Veronae) 5: 100 (1856)

Homotypic synonyms:
Catapyrenium michelii (A. Massal.) R. Sant., in Hawksworth, James & Coppins, Lichenologist 12(1): 106 (1980)
Dermatocarpon michelii (A. Massal.) Zwackh, Flora, Regensburg 45(34): 537 (1862)
Endocarpon hedwigii c michelii (A. Massal.) Garov., Memor. R. Istit. Lombardo, 3 Ser. 3: 271, tab. II, fig. 3 (1872)
Endocarpon michelii (A. Massal.) Bausch, Verh. naturw. Verein. Karlsruhe 4: 189 (1869)
Endopyrenium michelii (A. Massal.) Körb., Parerga lichenol. (Breslau) 4: 303 (1863)
Endopyrenium rufescens var. michelii (A. Massal.) Boistel, Nouv. Fl. Lich. (Paris) 2: 267 (1903)