Rhizostomeae is an
order
Order, ORDER or Orders may refer to:
* A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
...
of
jellyfish
Jellyfish, also known as sea jellies or simply jellies, are the #Life cycle, medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animal ...
. Species of this order have neither
tentacle
In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work main ...
s 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
pore
Pore may refer to:
Biology Animal biology and microbiology
* Sweat pore, an anatomical structure of the skin of humans (and other mammals) used for secretion of sweat
* Hair follicle, an anatomical structure of the skin of humans (and other ...
s that are linked to
coelenteron.
Edible jellyfish
Jellyfish species fished on a commercial basis for human consumption (both as a delicacy and for use in
traditional medicine
Traditional medicine (also known as indigenous medicine or folk medicine) refers to the knowledge, skills, and practices rooted in the cultural beliefs of various societies, especially Indigenous groups, used for maintaining health and treatin ...
) are all from this order
[López-Martínez; and Álvarez-Tello (2013). ''The jellyfish fishery in Mexico.'' Agricultural Sciences 4(6A): 57-61.] and include members of the families
Catostylidae,
Lobonematidae,
Rhizostomatidae and
Stomolophidae.
[Miura; Miura; and Park (2006). ''Collagen as the Major Edible Component of Jellyfish (Stomolophus nomural).'' Journal of Food Science 48(6): 1758–1760.][Kitamura; and Omori (2010). ''Synopsis of edible jellyfishes collected from Southeast Asia, with notes on jellyfish fisheries.'' Plankton Benthos Res 5(3): 106–118.][Omori; and Kitamura (2004). ''Taxonomic review of three Japanese species of edible jellyfish (Scyphozoa: Rhizostomeae).'' Plankton Biol. Ecol. 51(1): 36–51.] The jellyfish are typically dried and/or salted.
[ In China, which was the first country documented to use jellyfish as food, this has been practiced at least since the year 300 CE,][ but they are also commonly consumed in Japan (the largest consumer of jellyfish today), Korea and southeast Asia.][ Several countries outside Asia have also started catching and exporting these in recent decades.][
]
Taxonomy
, there were 92 recognized extant
Extant or Least-concern species, least concern is the opposite of the word extinct. It may refer to:
* Extant hereditary titles
* Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English
* Exta ...
species in Rhizostomeae.[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 These belong in the following families:Mastigiidae
Mastigiidae is a family of Scyphozoa, true jellyfish. The family is native to the Indo-Pacific, but a species of ''Mastigias'' has been Introduced species, introduced to the West Atlantic, and ''Phyllorhiza punctata'' has been introduced to the W ...
Stiasny, 1921 -- 5 genera
** Family Thysanostomatidae Gegenbaur, 1857 -- 1 genus
** Family Versurigidae Gegenbaur, 1857 (empty taxa)
Image:Cassiopea andromeda 2.JPG, '' Cassiopea andromeda'', a Cassiopeidae (upside-down jellyfish)
Image:Blue Blubber Jellyfish IMGP2102.JPG, '' Catostylus mosaicus'', a Catostylidae
Image:Cauliflour Jellyfish, Cephea cephea at Marsa Shouna, Red Sea, Egypt SCUBA.jpg, '' Cephea cephea'', a Cepheidae
Image:Spotted-jellyfish-af.jpg, '' Mastigias papua'', a Mastigiidae
Mastigiidae is a family of Scyphozoa, true jellyfish. The family is native to the Indo-Pacific, but a species of ''Mastigias'' has been Introduced species, introduced to the West Atlantic, and ''Phyllorhiza punctata'' has been introduced to the W ...
Image:Rizostoma pulmo.jpg, '' Rhizostoma pulmo'', a Rhizostomatidae
Image:Stomolophus meleagris.jpg, '' Stomolophus meleagris'', a Stomolophidae
Image:Thysanostoma loriferum Maldives.JPG, '' Thysanostoma loriferum'', a Thysanostomatidae
References
{{Taxonbar, from=Q838519
Cnidarian orders