Verrucaria limitatoides Servít

Lichenised. Poorly known taxon.
Substrate: calciferous 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 calcicolous species with a thin, whitish-grey, spreading thallus, hemispherically protruding ascomata (c. 0.2 mm in diam.), a loosely attached involucrellum reaching down about half of the perithecium, and oblong to ellipsoid ascospores (to c. 25 µm long); only known from the type locality in the Eastern Alps (Austria).
Austria: Tirol;