Anamorph: not described in the literature, although ascospores germinate to produce phialidic conidiogenous cells according to Corlett & Krug (1984). Teleomorph: stromata absent. Ascomata perithecia, 700-1000( -1200) µm high and 500-700 µm diam., scattered to gregarious, superficial on exposed dead wood or infrequently erumpent through attached bark, black, short cylindrical, upper fertile portion globose to subglobose, coarsely tuberculate and borne on a well-developed, short cylindrical, nontuberculate base. Ostiole not usually recognizable externally but in section seen as an apical thinning of the ascoma wall, the underlying area filled with thin-walled hyaline cells which disintegrate early, and the overlying wall cells eventually lysing. Ascomatal wall at the top and sides unevenly thickened owing to the presence of tubercules, composed of dark brown to blackish thick-walled, angular to tangentially flattened cells to 30 µm in length; walls of adjoining cells possessing prominent pores (Munk pores) ca. 1 µm diam., each bordered by a doughnut-shaped thickening; innermost zone bordering the centrum consisting of 4-6 layers of pale to hyaline tangentially flattened cells. Subiculum lacking, the ascomata attached to the substrate by a few dark brown hyphal strands. Interascal tissue absent. Asci arising from a basal cushion of thin-walled angular cells, 90-130 X 13-18 µm, narrowly clavate, long-stipitate, very thin-walled, not fissitunicate, 8-spored, deliquescing early. Ascospores irregularly fasciculate, 33-42 X 4-5 µm, narrowly cylindric-fusiform, straight to slightly curved, hyaline, the ends rounded, 1- ( to 3-) septate, guttulate, smooth, fairly thin-walled, without a gelatinous sheath or appendages.