Thallus in irregular patches 2-6 cm diam., ± confluent, 0.5 mm thick, chalky whitish, roughened, irregularly cracked-areolate, areolae to 2 mm diam., or less, convex, wrinkled, ± coriaceous. Apothecia scattered, sessile, solitary or 2-4 confluent and then ± deformed through mutual pressure, constricted at base, rounded to irregular, 0.3-1.5 mm diam., black, matt, epruinose, minutely roughened, plane to convex, margins thin, entire, black, raised, ± flexuose, excluded at maturity. Epithecium dense, granular, greenish-black 10-17 µm thick. Hymenium pale straw-coloured 80-95 µm tall. Hypothecium pale yellow-brown. Ascospores ellipsoid, 8.5-10.2 × 3-5.1 µm, often 1-septate as in .