Protoparmeliopsis muralis (Schreb.) M. Choisy var. schneebergensis (Zahlbr.) Hafellner & Türk
Syn.: Lecanora muralis (Schreb.) Rabenh var. schneebergensis Zahlbr.
Lichenised. Poorly known taxon.
Substrate: calciferous rocks
Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) 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: a variety with short, whitish-grey marginal lobes which are pruinose when young, and a verruculose-areolate thallus center; on exposed rock heads and boulders of calcareous rocks; not always distinguished and distribution therefore poorly known.
Austria: Steiermark; Niederösterreich (incl. Wien);