Verrucaria contardonis Servít

Lichenised. Poorly known taxon.
Substrate: calciferous rocks
Altitudinal distribution: submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a calcicolous species with a thin, whitish, spreading, continuous thallus (rimulose around the ascomata), hemispherically protruding ascomata (to 0.2 mm in diam.), an involucrellum adpressed to the perithecial wall and reaching down to the base, and oblong to ellipsoid ascospores (to c. 25 µm long); known only from the type locality (Italy).
Italy: Friuli;