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Stomolophus meleagris.jpg
Stomolophus meleagris
Scientific classification e
Kingdom: Animalia
Phylum: Cnidaria
Class: Scyphozoa
Order: Rhizostomeae

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 highly branched oral arms, along which there are suctorial minimouth orifices. (This is in contrast to other scyphozoans, which have four of these arms.) 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.


As of 2007, there were 92 recognized extant species in Rhizostomeae.[1] These belong in the following families:[1][2]


  1. ^ a b Daly, Brugler, Cartwright, Collins, Dawson, Fautin, France, McFadden, Opresko, Rodriguez, Romano & Stake (2007). The phylum Cnidaria: A review of phylogenetic patterns and diversity 300 years after Linnaeus. Zootaxa 1668: 127–182
  2. ^ WoRMS. "Rhizostomeae". World Register of Marine Species. Retrieved 4 August 2012. 
  • M. Omori and M. Kitamura (2004) Taxonomic review of three Japanese species of edible jellyfish (Scyphozoa: Rhizostomeae), Plankton Biol. Ecol. 51(1): 36-51.