Kramp, 1942
Umbrella up to 1.6 mm wide, 2 mm high, with flattened top and thin walls, with conical apex; numerous cnidocysts on exumbrella; manubrium cylindrical, proximal part vacuolated, distal part sexual; 4 large marginal bulbs each with ectodermal abaxial spur; 1 stiff tentacle, proximal part hollow, distal part solid with very thick mesoglea, with large terminal knob of cnidocysts; gonads first interradial, eventually encircling manubrium with age.