Acarospora macrospora (Hepp) A. Massal. ex Bagl.

Syn.: Acarospora castanea (DC.) Körb, Acarospora squamulosa sensu Th. Fr. non (Schrad.) Trevis., Myriospora macrospora Hepp
Lichenised.
Substrate: calciferous rocks
Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: on steeply inclined faces of fissured calcareous rocks in upland areas; widespread throughout the Alps. See also note on A. murorum.
Austria: Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Germany: Oberbayern; Schwaben; Switzerland: Bern; Graubünden; Luzern; Schwyz; Vaud; Valais; France: Alpes-de-Haute-Provence; Alpes-Maritimes; Drôme; Isère; Savoie; Haute-Savoie; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Slovenia: Alpine and Pre-Alpine Slovenia; Trnovsky Gozd;