Haeckel, 1879
Leptomedusae with small manubrium, usually on rather well differentiated gastric peduncle; 4-6 simple radial canals running from circular canal across underside of bell and along peduncle to manubrium; with or without excretory pores; with hollow tentacles; with or without cirri or marginal warts; gonads on radial canals separated from manubrium, in each species on well defined part(s) of radial canal; 8 to many statocysts; without ocelli.
Genus Eirene
Genus Eutima
Genus Eutonina
Genus Helgicirrha
Genus Irenium
Genus Phialopsis