Cat. Lich. Sondr.: 87 (1860).

Basionym: Lecidea spuria Schaer., Lich. helv. spicil. 3: 127 (1828).

Chemistry: Medulla I+ pale blue. Atranorin, norstictic acid, stictic acid (López Silanes & Paz Bermudez 2002: 77).

Ecology: On siliceous rock.