Basionym Name:Lecidea placidensis H. Magn., Meddn Göteb. Bot. Trädg. 10: 6, 41, fig. 20 (1936)
Homotypic synonyms:Fuscidea placidensis (H. Magn.) R.C. Harris, in Egan, Bryologist 90(2): 163 (1987)Lecanora placidensis (H. Magn.) Knoph, Leuckert & Rambold, in Knoph & Leuckert, Nova Hedwigia 59: 455-508 (1994)Lecidella placidensis (H. Magn.) R.C. Harris, Evansia 5(1): 4 (1988)