Homotypic Synonyms See Note

Basionym Name:
Rhizocarpon obscuratum subsp. roridulum Th. Fr., Lich. Scand. (Upsaliae)(2): 629 (1874)

Homotypic synonyms:
Lecidea obscurata var. roridula (Th. Fr.) Vain., Meddn Soc. Fauna Flora fenn. 10: 139 (1883)
Lecidea roridula (Th. Fr.) Stizenb., Ber. Tät. St Gall. naturw. Ges.: 235 (1876)
Rhizocarpon obscuratum var. roridulum (Th. Fr.) Elenkin, Lich. Fl. Ross. Med. 3-4: 447 (1911)
Rhizocarpon roridulum (Th. Fr.) Malme, Svensk bot. Tidskr. 8(no. 3): 291 (1914)
Rhizocarpon roridulum f. roridulum (Th. Fr.) Zahlbr., Cat. Lich. Univers. 4: 391 (1926)