Allman, 1863
Manubrium short and broad. Umbrella 2-3.5 mm wide and high, semiglobular, mesoglea fairly thick; oral tentacles divided 1-2 (rarely 3-6) times; 4 interradial gonads reaching perraddii, globular in females, prolonged along perradial side of peduncle in males; marginal bulbs small, with 3-5 (rarely 6-7) long marginal tentacles; ocelli round.