Thallus crustose, effuse, ecorticate but usually with a cartilaginous corticiform layer, not distinctly lobate. Prothallus in foliicolous species indistinct. Photobiont green, species of Chlorococcaceae, probably . Apothecia prominent, sessile, constricted at base, rounded, lecideine, brown-black to black, with a well-developed paraplectenchymatous excipulum. Paraphyses ± simple or richly branched, capitate, club-shaped, brown-black at apices. Asci thick-walled usually with one spore, sometimes 2-8-spored. Ascospores large, muriform or submuriform, colourless or brownish, not halonate. Pycnidia sessile, globose to cupuliform. Conidia simple, ellipsoid to flask-shaped or dumb-bell shaped.