Acarospora murorum A. Massal.

Syn.: Acarospora macrospora (Hepp) A. Massal. ex Bagl. subsp. murorum (A. Massal.) Clauzade & Cl. Roux. Acarospora truncata (A. Massal.) A. Massal., Biatorella truncata A. Massal.
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a mild-temperate species found on walls, gravestones, and monuments; related to A. macrospora, but with a different ecology and altitudinal distribution; apparently more frequent in the Western and Southern Alps.
Austria: Salzburg; Switzerland: Bern; Luzern; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Savoie; Haute-Savoie; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Liguria;