Thallus effuse, rarely more than 1–2 mm across; areolate, areoles flat to slightly convex, irregular, 200–400 µm across, grey to pale brown, often with a paler margin, contiguous or somewhat dispersed on a black hypothallus. Cortex 10–20 µm thick with pale brown (rarely red-brown or ± hyaline) pigmented upper layer 7–10 µm thick; epinecral layer thick, 45–95 µm, 20–25 µm at edge of areoles; medulla and upper cortex I+ blue. Photobiont chlorococcoid, algal cells 9–15 µm diam.
Anamorph: not known.
Teleomorph: ascomata apothecia, 400–600 µm diam, black, lecideine, sessile, slightly convex with a thin (ca 50 µm), barely raised margin. Excipulum dark blue-black with swollen (to 5 µm diam) cortical cells. Hymenium 90–105 µm tall; epihymenium ca 10 µm tall, sharply delimited, blue-black (H+ blue, N+ red; cinereorufa-green). Hypothecium dark brown. Interascal tissue: paraphyses sparingly branched and anastomosing, ca 1.5–2 µm diam, swelling at the apex to ca 5 µm with a dark blue-black cap. Asci 45–50 x 12–15 mm, cylindrical to slightly clavate, Lecidea–type. Ascospores 12–14 x 5–6 mm, simple, hyaline.
Chemistry: all spot tests negative; no substances detected by TLC.