Homotypic Synonyms See Note

Basionym Name:
Placidium custnani A. Massal., Lotos 6: 78 (1856)

Homotypic synonyms:
Catapyrenium custnani (A. Massal.) Jatta, Syll. Lich. Ital. (Trano): 521 (1900)
Dermatocarpon custnani (A. Massal.) Zwackh, Flora, Regensburg 45(34): 537 (1862)
Endocarpidium custnani (A. Massal.) Müll. Arg., Mém. Soc. Phys. Hist. nat. Genève 16(2): 413 (1862)
Endocarpon custnani (A. Massal.) Hepp, Flecht. Europ.: no. 669 (1860)
Placidiopsis custnani (A. Massal.) Körb., Parerga lichenol. (Breslau) 4: 305 (1863)
Rhodocarpon custnani (A. Massal.) Lönnr., Flora, Regensburg 41(21): 329 (1858)