Verrucaria porphyricola Servít

Lichenised. Poorly known taxon.
Substrate: siliceous rocks
Altitudinal distribution: alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)
Note: a rarely collected species of basic siliceous rocks (see Nimis 1993: 747-748), related to Verruculopsis minuta.
Italy: Trentino Alto Adige;