Verrucaria savonensis Servít

Lichenised. Poorly known taxon.
Substrate: siliceous rocks
Altitudinal distribution: submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)
Note: a silicicolous species with an epilithic, brownish-grey, rimose to areolate thallus forming patches to 3 cm in diam., with a brown to blackish-brown basal layer, almost entirely immersed ascomata (to c. 0.2 mm in diam.), an adpressed involucrellum reaching down almost to the base of the perithecium and merging with the basal layer, and oblong to ellipsoid ascospores (to c. 25 µm long); only known from the type locality at the base of the Western Alps (Italy).
Italy: Liguria;