Description contributed by Graham Kinsey (CABI).
Anamorph: a connection with Stilbospora macrosperma Berk. & Br. (non Pers.) has been claimed.
Teleomorph: stromata visible from the surface as small flattened-conical pustules 0.5-2 mm diam, with a central angular rupture through which a small loose cluster of short stout ostioles emerge, hardly protruding from the surface. Ectostroma hardly developed. Ascomata 250-600 µm diam, ± globose but frequently irregular due to compression, loosely clustered. Peridium composed of large irregular thick-walled cells. Interascal tissue of paraphyses, broad and strap-like, quickly evanescent. Asci 170-300 x 25-35 µm, at first widely clavte, elongating with maturity, the apical wall slightly thickened, 8-spored. Ascospores 38-70 x 15-23 µm, 3-septate, appendages thick and coiled or sometimes long tapering and flexuous to 70 µm or more long and 3.5-7 µm diam.
In dead branches of Ulmus.
From England (North East Yorks).