Thallus squamulose or minutely lobate, squamules 1.5-5 mm diam., foliose, heteromerous, dorsiventral, loosely or closely attached, corticate on both upper and lower surfaces, saxicolous or terricolous. Upper cortex pseudoparenchymatous, cells swollen, with or without isidia, with or without soredia or pruina. Photobiont green, . Lower surface corticate, with short rhizines. Apothecia biatorine, 1-2 mm diam., brownish or black. Excipulum swollen. Hymenium 80-100 µm tall. Paraphyses 3 µm thick, apices thickened (5 µm) coherent, conglutinate, not branched or anastomosing. Asci clavate, 8-spored, thin-walled with clearly developed apical tholus, tholus with amyloid ring structure. Ascospores colourless, simple, thin-walled, not halonate, globose to ellipsoid.