Eukaryota  >  Metazoa  >  Cnidaria  >  Hydrozoa

Order	Family	Genus	Species
Actinulida	2	2	37
Anthoathecata	61	138	1267
Leptothecata	40	154	828
Limnomedusae	5	14	228
Narcomedusae	6	15	62
Siphonophorae	18	57	235
Trachymedusae	3	21	53