Rhizostomae or Rhizostomeae is an order of jellyfish. Species of this order have neither tentacles nor other structures at the bell's edges. Instead, they have eight - unlike other scyphozoans which have four - highly-branched oral arms, along which there are suctorial minimouth orifices. These oral arms become fused as they approach the central part of the jellyfish. The mouth of the animal is also subdivided into minute pores that are linked to coelenteron.

Distribution

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Generally observed at low latitudes, typically in the Pacific Ocean.

Families

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• Suborder: Daktyliophorae
  • Catostylidae
  • Lobonematidae
  • Lychnorhizidae
  • Rhizostomatidae
  • Stomolophidae
• Suborder: Kolpophorae
  • Cassiopeidae
  • Cepheidae
  • Mastigiidae
  • Thysanostomatidae
  • Versurigidae

Unknown family

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Genus Nemopilema nomurai (formerly Stomolophus nomurai), aka "Nomura's jellyfish" or "Echizen kurage"

References

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• M. Omori and M. Kitamura (2004) Taxonomic review of three Japanese species of edible jellyfish (Scyphozoa: Rhizostomeae), Plankton Biol. Ecol. 51(1): 36-51.

Cnidarians

Rhizostomeae | Rúrkoústovky | Rhizostomeae