Anamorph: not known. Teleomorph: stromata black, forming an irregular to conical carbonaceous mass below the bark of the host in which the ascomata are immersed in groups of 1-8, reaching the surface through slits in the bark. Ascomata 500-750 µm diam., globose to subglobose, with papillate, erumpent ostioles which may fuse into a common structure surrounded by a brownish disc at the surface of the stroma. Interascal tissue consisting of sparse branched, cellular pseudoparaphyses to ca 2 µm diam. Asci clavate, fissitunicate with a distinct ocular chamber, dextrinoid, 8-spored. Ascospores (18-) 22-26 (-30) x 6-8.5 µm, broadly fusiform to elongated ellipsoidal, 3-septate (1-septate in young ascospores), not constricted at the septa, the primary septum median, middle cells equal and shorter but broader than end cells, the ends rounded, without a gelatinous sheath or appendages.