Thallus in orbicular to spreading patches, 2-10(-20) cm diam., whitish or grey-white, areolate, areolae minute, irregular, thick black prothallus visible between areolae giving a marbled appearance to thallus, surface smooth, matt, Apothecia orbicular, innate, disc flush with thallus surface, 0.5-1.2 mm diam., solitary or 2-4-confluent, round to irregular, disc black, matt, epruinose, smooth to ± gyrose-uneven, plane to subconvex, margins very thin, black, slightly raised. Epithecium granular, brown-black or greenish-black, 8.5 µm thick. Hymenium pale yellowish, 30 µm tall. Paraphyses dense, apically capitate, to 5 µm thick. Hypothecium pale brown or yellow-brown, to 40 µm thick. Asci clavate, 46 × 17 µm, close to surface of disc. Ascospores ellipsoid, 7-10 × 5.1-6 µm.