Rinodina gennarii Bagl.
Rinodina subexigua (Nyl.) H. Olivier
Rinodina oleae Bagl. ?
Thallus crustose, thin and sometimes evanescent, more or less smooth to rimose and slightly verrucose, pale grey, dark grey, olive-grey, grey-brownish. Apothecia lecanorine, usually numerous, sometimes clustered, sessile when mature, 0.2-0.8 mm diam., disc flat but soon becoming convex, brown-black, blackish, exciple usually thin, persistent, paler. Ascii club-shaped, 8-spored, 50-55 x 20-25 according to our measures. Ascospores brown, broadly ellipsoid, 1-septate, widened at septa level (distinct in 5% K solution), 13-16 x 7-9 µm, (11-17 x 7-10 µm according to our measures). Photobiont: Trebouxia. Chemical spot tests negative. Grows on nutrient-rich calcareous or basic silicated rocks, but in our prospection area, grows also on stone walls, concrete, bricks, seldom on rotten wood (Rinodina oleae ?). Highly variable species (or community?) by its thallus and the size of ascospores. N.B. Often together with Lecanora dispersa.