Verrucaria cambrini Servít

Lichenised. Poorly known taxon.
Substrate: calciferous rocks
Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)
Note: a species with a thin, epilithic, rimulose to subareolate, olive-greenish thallus, ascomata protruding, but laterally obtected by a thin thalline layer, involucrellum slightly spreading with the lower portion, reaching down about a third of the perithecium, ascospores broadly ellipsoid to subglobose (to 20 µm long); on calcareous rocks (the type is on roof tiles!); known from a few scattered localities in Central Europe, including the Eastern Alps (Austria).
Austria: Vorarlberg;