Anamorph: not known. Teleomorph: stromata absent. Ascomata perithecia, 120-150 µm diam., in large clusters, subglobose, becoming erumpent through the host thallus, with a shortly papillate, hardly or partially exposed neck, ostiolate, black. Peridium carbonaceous, comprising 3-6 layers of radially compressed thick-walled dark brown angular cells 4-5 µm in diam. Interascal tissue absent, the ostiole lined internally with periphyses. Asci in a basal fascicle, forming in a gelatinized matrix, 45-58 x 9-12 µm [measured in water], clavate to cylindric-clavate, with a markedly thickened apex when young, fissitunicate, not staining in iodine, 8-spored. Ascospores biseriately arranged, 8-9.5 x 3.5-4 µm, clavate-ellipsoidal, the apex obtuse and the base rounded, somewhat constricted at the single ± median septum, dark brown, smooth- and thick-walled, without an epispore, gelatinous sheath or appendages.