Haeckel, 1879
Medusae with solid tentacles; ocelli when present adaxial; with oral tentacles armed with cnidocyst clusters, or with mouth bearing arms, knobs, or clusters armed with cnidocysts.
Family Bougainvilliidae
Family Clavidae
Family Cytaeididae
Family Eucodoniidae
Family Hydractiniidae
Family Rathkeidae