Placopyrenium fuscellum (Turner) Gueidan & Cl. Roux
Syn.: Lichen fuscellus Turner, Lithocia fuscella (Turner) A. Massal., Verrucaria fuscella (Turner) Winch, Verrucaria glaucelloides Hepp, Verrucaria glaucina auct. non Ach., Verrucaria glebulosa Nyl., Verrucaria griseoatra (Kremp.) Servít
Lichenised.
Substrate: calciferous rocks, intermediate rocks (such as calciferous schists)
Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) 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 calciferous rocks (mainly limestone and dolomite), often on Verrucaria nigrescens; a polymorphic taxon in need of revision.
Austria: ?Vorarlberg; Tirol; Salzburg; Kärnten; Steiermark; Oberösterreich; Niederösterreich (incl. Wien); Switzerland: Appenzell; Bern; Graubünden; Valais; France: Alpes-de-Haute-Provence; Haute-Alpes; Alpes-Maritimes; Drôme; Isère; Savoie; Haute-Savoie; Vaucluse; Var; Italy: Friuli; Veneto; Trentino Alto Adige; Lombardia; Piemonte; Valle d'Aosta; Slovenia: Alpine and Pre-Alpine Slovenia;
