Basionym Name:Lecanora placenta Ehrenb. ex Nyl., Act. Soc. linn. Bordeaux 25: 64 (1864)
Homotypic synonyms:Acarospora placenta (Ehrenb. ex Nyl.) Hue, Nouv. Arch. Mus. Hist. Nat., Paris, 5 sér. 1(2): 162 (1909)Acarospora placenta f. placenta (Ehrenb. ex Nyl.) Hue, Nouv. Arch. Mus. Hist. Nat., Paris, 5 sér. 1(2): 162 (1909)