Fleming, 1828
Capitata generally with cylindrical manubrium with circular base; mouth usually simple and circular; gonads normally completely surrounding manubrium; marginal tentacles developed only at junction between radial and circular canals (except in Eleutheriidae); with 1, 4, rarely 8 or 16 marginal tentacles.
Family Corynidae
Family Corymorphidae
Family Eleutheriidae
Family Euphysidae
Family Margelopsidae
Family Tubulariidae