Thallus pale greyish-white or olive-greyish, smooth, continuous or minutely areolate-cracked in parts, in bands or patches 2-5 cm diam., often delimited at margins by a thin, black, wavy prothallus, corticolous. Apothecia black, prominent, scattered or ± contiguous, solitary or 2-confluent, 0.1-0.8 mm diam., concave to plane, disc epruinose, margins concolorous with disc, relatively thick and prominent. Epithecium granular, brownish, 21 µm thick. Hymenium pale yellowish-brown, 120-160 µm tall. Hypothecium brownish or reddish-black, to 150 µm thick. Asci clavate, rather narrow, 160 × 20-25 µm. Ascospores 20-35-septate, straight, with pointed ends, 110-140 × 4-5.1 µm. Chemistry: Nil.