Mayer, 1910
Trachymedusae with either simple manubrium without mesenteries, or with eight-lobed manubrium, with eight mesenterial partitions; with marginal tentacles grouped into more or less well defined clusters, some with adhesive disks or with very numerous tentacles, not in clusters but inserted at various levels of exumbrella; no centripetal canals or peduncle; with 8 radial canals; gonads either attached onto manubrium, on sides of 8 manubrial lobes, or on radial canals adjacent to manubrial lobe; free ecto-endodermal statocysts.
Genus Ptychogastria