Thallus crustose, spreading, closely attached, tartareous, greyish-white, continuous to areolate-cracked, prothallus indistinct or lacking. Areolae to 1 mm diam., separated by very narrow cracks, plane, smooth, matt. Apothecia numerous, innate, scattered between areolae, disc black, plane to subconvex, epruinose. Hymenium colourless 100-120 µm tall. Paraphyses capillary, straight, not much branched, not swollen at apices. Asci ellipsoid-clavate, rounded at apices, 8-spored. Ascospores colourless becoming brownish, ellipsoid to oval, muriform, cells minute, angular, 27-29 × 9-11 µm, halonate.

Thallus crustose, orbicular to spreading, to 8 cm diam., areolate, prothallus indistinct or absent. Areolae small, 0.2-0.3 mm diam., greyish-white, plane to convex, often almost nodular-papillate, separated by narrow black, cracks. Apothecia crowded, scattered, sessile, rounded, black, shining, epruinose, 0.5-1 mm diam., plane to convex, margins prominent, entire. Hymenium brownish, 120 µm tall. Paraphyses filiform, not much branched. Hypothecium thick, brown-black. Asci 8-spored, oval-clavate, apices rounded. Ascospores triseriate, colourless to brownish, ellipsoid, apices rounded, muriform, 18-23 × 7.5-9 mm, surface corrugate.