Thallus thick, composed of gnarled, warted areoles, ascending at the edges, with a smooth surface, to 2 mm wide, grey-brown to black-brown. Anamorph: conidiomata pycnidial. Conidia c. 12-13 × ca 0.7 μm, filiform, curved, aseptate, hyaline. Teleomorph: ascomata apothecia, to 1.5 mm diam. crowded, sessile, constricted at the base. Disc black-brown, red-brown when wet, flat to weakly convex, undulating, flexuose when old, both disc and thalline margin densely pruinose. Thalline margin swollen, irregularly crenulate, concolorous with the thallus, with a cartilaginous cortex composed of a radiating network of hyphae with elongated, thread-like, narrow cells with very thick walls, like a netted matrix. Proper exciple absent. Hymenium 65-95 μm high, with photobiont cells below. Epithecium black-brown to green-black. Interascal tissue of mostly unbranched paraphyses, the apical part 1- to 2-celled. Ascospores 16-29 × 4-6 μm, 3- to 7-septate, elongate, slightly curved, the ends somewhat attenuated to abruptly rounded, without a gelatinous sheath or perispore. Chemistry: no information available.