Ric. Auton. Lich. Crost. (Verona): 30 (1852)

Basionym: Lichen parellus L., Mant. Pl. 1: 132 (1767).

Chemistry: Parellin, variolaric acid, lecanoric acid, alpha-alectoronic acid, atranorin, ergosterol-5alpha,8alpha-peroxide ("ergosterol peroxide") (Millot et al. 2007: 318 from material from Brittany, France).