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Physonectae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
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

Biology Encyclopedia

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Source: Wikispecies: All text is available under the terms of the GNU Free Documentation License