Calycophorae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Phylum: Cnidaria
Cladus: Medusozoa
Classis: Hydrozoa
Ordo: Siphonophora
Subordo: Calycophorae
Familiae: Abylidae - Clausophyidae - Diphyidae - Hippopodiidae - Prayidae - Sphaeronectidae

Reference

http://www.ville-ge.ch/mhng/hydrozoa/sipho/calycophorae.htm