Generic short diagnoses:
Medium sized, ± disc-shaped, brown to black operculate discomycetes with amyloid asci and gelatinous outer tissue (textura angularis/globulosa). On substrates soaked by water, mainly on wood.
The picture originates from the MycoKey 2.0 DVD. Here you will also find a larger picture along with a detailed generic description, references and an interactive, synoptical key to genera.