Teleomorph: Stromata composed of subcortical brown thick-walled hyphae, often degenerating by maturity of the ascostromata. Ascomata 300-500 µm diam, globose to turbinate, the base slightly constricted, the apical portion somewhat flattened with a minutely papillate ostiole, matt black, minutely verrucose, often coalescing, erumpent in ± linear clusters through the bark. Peridium composed of an outer layer of strongly melanized textura angularis, with an inner layer of similarly shaped paler cells, the locule surrounded by thick-walled hyaline flattened cells. Interascal tissue composed of copious cellular pseudoparaphyses to 3 µm diam, frequently septate. Asci 134-180 x 13-15 µm, cylindrical, usually short-stalked, thick-walled and fissitunicate, the apex rounded to truncate with a distinct apical invagination in the inner wall, 8-spored. Ascospores 21-26(-28) x 9-11 µm, cylindric-ellipsoidal, the ends usually obtuse, constricted at the ± median primary septum, the halves ± similar in shape, golden brown, without a mucus sheath, with 4-6 secondary transverse and 1-2 longitudinal septa, variable in orientation.
The type material (and apparently the only GB collection) appears no longer to contain the fungus; the description is taken from an Italian specimen. If this is correctly identified, the species may be a synonym of Teichospora obducens; there appear to be few substantial differences between the two taxa. It should also be compared with Karstenula rhodostoma, also recorded on Frangula.