Physonectae

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Phylum: Cnidaria
Cladus: Medusozoa
Classis: Hydrozoa
Ordo: Siphonophora
Subordo: Physonectae
Familiae: Agalmatidae - Apolemiidae - Athorybiidae - Erennidae - Forskaliidae - Physophoridae - Pyrostephidae - Rhodaliidae

Reference

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