Distribution: C - Tosc (Nascimbene & al. 2021), Sar (Scheidegger 1993).
Description: Thallus crustose, episubstratic, dull brownish grey, rimose to areolate, with clearly elongate marginal areoles, but not placodioid. Medulla white, not amyloid, I-. Apothecia biatorine, 0.2-0.3 mm across, innate, with a black disc and a narrow, brown proper margin. Proper exciple thin, dark brown to brown-black in outer part, colourless within, N-, aethalea-type; epithecium brown; hymenium colourless, without oil droplets, c. 75 µm high; hypothecium dark brown. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, not constricted at septum, brown, oblong, 10-12 x 7-8 µm, Buellia-type, with a psilate ornamentation. Photobiont chlorococcoid. Spot tests: thallus K+ yellow turning red, C-, KC-, P-. Chemistry; norstictic and connorstictic acids.
Note: a Mediterranean species of hard siliceous rocks in warm-dry habitats, sometimes growing on other crustose lichens.