Basionym Name:Lecidea egenula Nyl., Flora, Regensburg 48: 147 (1865)
Homotypic synonyms:Bacidia arceutina var. egenula (Nyl.) Grønlund, Bot. Tidsskr. 4: 166 (1871)Bacidia egenula (Nyl.) Arnold, Flora, Regensburg 53(30–31): 472 (1871)Bacidia egenula var. egenula (Nyl.) Arnold, Flora, Regensburg 53(30–31): 472 (1871)Bacidia endoleuca var. egenula (Nyl.) Boistel, Nouv. Fl. Lich. (Paris) 2: 183 (1903)Bacidina egenula (Nyl.) Vězda, Folia geobot. phytotax. 25(4): 432 (1991)