Anamorph: colonies dark brown to black, effuse to dense. Conidiomata absent. Conidiophores comprising a single short flask-shaped conidiogenous cell 14-16 x 9-12 μm in size, tapering to 4-5.5 μm at the cylindrical neck, not proliferating. Conidia 90-205 x 9-14.5 μm, cylindrical, straight, sometimes curved or bent, the apex rounded, the base 4-4.5 μm diam. and truncate, 12- to 18-septate, medium to dark reddish brown with an amorphous yellow globose to irregular cap, secession schizolytic. Teleomorph: stromata absent. Ascomata 300-400 μm diam., superficial, globose to pyriform, shortly papillate, smooth or sometimes setose due to development of conidium-like structures from the outer wall, solitary or clustered, nearly black. Ostiole 30-40 μm diam., lined with hyaline periphyses 15-20 x 2-3 μm in size. Ascomata wall carbonaceous, brittle, thick, the outer layer 25-30 μm thick, composed of 4-6 layers of dark brown, thick-walled cells 4-6 μm diam., the inner layer 10-15 μm thick, composed of prismatic hyaline to yellow thin-walled cells 8-12 x 2-3 μm in size. Setae (when present) scattered, 30-90 x 5-7 μm in size. Interascal tissue of simple paraphyses, copious, 2-4 μm diam. above, inflated to ca 18 μm near the base, septate at 20-35 μm intervals, not guttulate, without a gelatinous coat. Asci 100-120 x 19-23 μm, ± cylindrical, the apical part slightly attenuated (above the spores), the apex rounded to truncate, fairly short-stalked, thin-walled and not fissitunicate, with a small and inconspicuous IKI-negative apical ring that is stainable with blue ink, pulvillus absent, 8-spored. Ascospores biseriately arranged, 35-40.5 x 8-9.5 μm, cylindric-fusiform, often slightly inequilateral to curved, (5-)7-septate, widest at the middle, the central two cells longer than wide, end cells short, guttulate, light yellow-brown with hyaline end cells, smooth, lacking a gelatinous sheath or appendages.