Fewkes, 1886
Trachymedusae with wide, circular manubrium; without peduncle; without centripetal canals; 8 or more radial canals; numerous marginal tentacles of different size, but all structurally alike and arranged in a single series; each marginal tentacle with a flexible proximal portion and a stiff spine-like distal portion; with free ecto-endodermal statocysts.
Genus Botrynema
Genus Halicreas
Genus Haliscera
Genus Halitrephes