- Peracarida
Taxobox
name = Peracarida
image_width = 250px
image_caption = "Eophreatoicus " (a fresh water isopod fromAustralia )
regnum =Animal ia
phylum =Arthropod a
subphylum = Crustacea
classis =Malacostraca
subclassis =Eumalacostraca
superordo = Peracarida
superordo_authority = Calman, 1904
subdivision_ranks = Orders
subdivision =Amphipoda Cumacea Isopoda Lophogastrida Mictacea Mysidacea Spelaeogriphacea Tanaidacea Thermosbaenacea The superorder Peracarida is a large group of
crustacean s, having members in marine, freshwater, and terrestrial habitats. They are defined by the possession of a single pair ofmaxilliped s (rarely 2–3), ofmandible s with an articulated accessory process between the molar and incisor teeth in the adults (called the "lacinia mobilis"), of acarapace which is often reduced in size and is not fused with the posterior thoracic somites. In all orders except the Thermosbaenacea, where the carapace is used to brood eggs, the basalmost segments of the legs bear thin flattened plates (oostegites) which enclose a ventral brood pouch, known as a "marsupium". The young hatch at a post-larval, prejuvenile stage called a "manca " which lacks the last pair of legs.References
*cite journal |year=1904 |title=On the Classification of the Crustacea Malacostraca |journal=The Annals and Magazine of Natural History, including Zoology, Botany, and Geology |volume=13 |issue=74 |pages=144–158 |author=W. T. Calman
*cite book |url=http://www.nhm.org/research/publications/CrustaceaClassification.pdf |title=An Updated Classification of the Recent Crustacea |author=Martin, J. W. & Davis, G. E. |year=2001 |pages=132 pp. |publisher=Natural History Museum of Los Angeles CountyExternal links
* [http://www.tafi.org.au/zooplankton/imagekey/malacostraca/peracarida/ Peracarida fact sheet - Guide to the marine zooplankton of south eastern Australia]
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