Verrucaria langhensis Servít

Lichenised. Poorly known taxon.
Substrate: calciferous rocks, intermediate rocks (such as calciferous schists)
Altitudinal distribution: submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a species with a thin, brown, spreading, rimose to areolate thallus (fruiting areolae convex, to 0.8 mm in diam.) with a thick brown-black basal layer, hemispherically protruding ascomata (to 0.3 mm in diam.) covered by a thin thalline layer, involucrellum adpressed to the perithecial wall reaching down to the base and fusing with the basal layer, and oblong to ellipsoid ascospores (exceeding 30 µm in length); on calcareous schists, only known from the type locality in the Western Alps (Italy).
Italy: Piemonte;