Acarospora laqueata Stizenb.
Syn.: ?Acarospora caesiocinerea B. de Lesd., Lecanora laqueata (Stizenb.) Stizenb.
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: on hard calcareous rocks, both on vertical faces and at the top of birds' perching sites in dry-continental areas; very rare in the Alps.
Switzerland: Valais; France: Alpes-de-Haute-Provence; Vaucluse; Var; Italy: Lombardia;