Thallus pale grey-white, very thin, dull, or shining and ± varnish-like in places, arachnoid or lacking in parts, elsewhere rather granular or subverrucose or irregularly cracked, in irregular patches to 4 cm diam. Apothecia ± sessile or semi-immersed, 0.5-1.5 mm diam., margins thick, cracked, coarse, pulverulent exfoliating, -like, often obscuring disc, concolorous with thallus, pore 0.2-0.6 mm diam., disc pale pinkish-buff or whitish, granular. Hymenium colourless 102-120 µm thick. Ascospores 8 per ascus, colourless, muriform, broadly fusiform-ellipsoid, apices rounded or slightly pointed, (35-)50-60 × 12-15(-20) µm. Chemistry: TLC - four unidentified compounds.