Description contributed by Graham Kinsey, CABI, based on Wehmeyer (1933).
Anamorph: Phomopsis cryptica (Sacc.) Höhn. (1906). Alpha-conidia 6-8 x 2-2.5 µm; beta-conidia 16-33 x 1 µm.
Teleomorph: stromata on host surface as small circular, blackened ectostromatic discs or as pulvinate confluent pustules, or as barely erumpent ostioles, surface of bark irregularly blackened, ventral zone present or absent. Ascomata 400-800 µm diam, scattered singly but often collectively erumpent, usually immersed in wood. Ascospores 11-14 x 2.5-3.5 µm.
Wehmeyer considered this to belong within the D. eres aggregate.