Catillaria detractula (Nyl.) H. Olivier
Expos. Lich. Ouest France 2: 129 (1901).
Basionym: Lecanora detractula Nyl., Flora 58: 444 (1875).
Chemistry: C-, KC-, P-, pigment of excipulum and epithecium K- faintly reddish, HNO3 purple red, J+ hymenium blue violet ... No lichen substances (Kilias 1981: 377).