Thallus pale whitish-grey, sparse, granular to effuse, delimited by a thin, black, marginal prothallus, corticolous or lignicolous. Apothecia 0.1-0.8 (rarely 2-4) mm diam., sessile, scattered, solitary, round to subirregular, disc plane to subconvex, matt or shining, ± translucent, pale red-brown to dark brown-black, with or without a thin ± obsolete white pruina, mainly glabrous, margins raised, concolorous with disc, entire, thin, persistent. Epithecium pale olive-yellowish, granular, 8-10 µm tall. Hymenium 30-60 µm tall, colourless. Hypothecium 25 µm thick, pale brownish. Paraphyses conglutinate, slightly swollen at apices, simple. Ascospores ellipsoid-cylindrical or oblong-fusiform with slightly pointed ends, straight, narrow, 8.3-12(-13) × 2-3 µm.

Thallus whitish, matt or slightly glossy, thin and rimose, to irregularly convex-areolate, more rarely granular-verrucose, areolae c. 0.04-0.3 mm diam., effuse or bordered by a thin, dark line of prothallus. Apothecia scattered, c. 0.3-0.6(-0.8) mm diam., pinkish-brown to black with thin, smooth, sometimes flexuose, paler or concolorous margin, disc sometimes faintly white-pruinose. Hymenium colourless, 35-45 µm tall. Epithecium straw-coloured to dark brown, sometimes with minute granules dissolving in K. Asci 30-40 × 9-1 µm. Ascospores oblong-ellipsoid, straight, (0-)1(-3)-septate, 8-16 × 2.5-3.5 µm diam., apices clavate to capitate to 4.5 µm diam., often dark brown. Hypothecium colourless. Excipulum straw-coloured, with numerous, minute crystals dissolving in K, upper part sometimes pale brown, K+ tinged purple. Pycnidia numerous, appearing as innate black dots, c. 0.15-0.2 mm diam., sometimes surrounded by a thalline rim. Conidiogenous cells 6-8 × 1.5-2 µm, sometimes proliferating. Conidia ovoid to short-cylindrical, 3.7-4 × 1.5-2 µm. Chemistry: Cortex K+ pale yellow, C-, Pd-.