Haeckel, 1879
Unbranched and/or branched radial canals and a ring canal; with or without subgenital pits.
Subfamily Aureliinae [Aurelia aurita ov ]
Subfamily Deepstariinae [Deepstaria enigmatica ov ]
Subfamily Poraliinae [Poralia rufescens ov ]
Subfamily Sthenoniinae [Phacellophora camtschatica ov ]
Subfamily Ulmarinae [Discomedusa lobata ov ]
Subfamily Stygiomedusinae [Stygiomedusa gigantea ov ]