Ostracoda

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Ostracoda

[ä′sträk·ə·də]
(invertebrate zoology)
A subclass of the class Crustacea containing small, bivalved aquatic forms; the body is unsegmented and there is no true abdominal region.

Ostracoda

 

a subclass of invertebrates of the class Crustacea. The body, which measures from 0.2 to 23 mm long, is enclosed in a calcareous bivalve carapace. The head is indistinct from the trunk, which bears three pairs of limbs and terminates in a biramous furca. Most ostracods have one simple eye, but some have compound eyes. There are about 2,000 species, distributed in seas and freshwaters. The majority of ostracods are benthic. They serve as food for some commercial fishes. Fossil ostracods, which have been found in Cambrian deposits, are of major significance in stratigraphy and are the most important guide fossils used in locating petroleum and gas deposits.

REFERENCES

Bronshtein, Z. S. Ostracodapresnykhvod. Moscow-Leningrad, 1947.
Zhizn’ zhivotnykh, vol. 2. Moscow, 1968.
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(1974) described a fauna of bivalves, gastropods and ostracods, notably with few exclusively marine taxa.
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CCA identified seven environmental variables (CaC[O.sub.3], TP, TN, C/N, MAT, MAR, BSi) that significantly explained the variation in the ostracod assemblages (Figure 5).
The change of ostracods and biosilicon from Lake Lugu sediment record and the cause analysis in last hundred years
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"Ostracods are the most abundant fossil arthropods, occurring ubiquitously as bivalved shells in rocks of the last 490 million years, and are common in most water environments today.
Fossils of 425m-year-old tiny shrimp-like creatures discovered
(1980): The littoral system ostracodes from the bay of Bou-Ismail, Algeria.
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Only juvenile forms of this ostracod were collected and sent to C.
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The ostracod component in playas often differ significantly (Horne 1996).
A key to the common seed shrimp (Crustacea: Ostracoda) of the playa lakes of the Llano Estacado region of northwestern Texas
A rich benthic fauna of animals typical of the Baltic Sea was found in the cores taken from the open bay of Reigi laht: the polychaete Hediste diversicolor, the oligochaetes Heterochaeta costata, Paranais litoralis, Amphichaeta sannio, and Lumbricillus sp., the priapulid Halicryptus spinulosus, a poorly preserved and hence unidentified prosobranchian gastropod, the meiobenthic ostracod Cyprideis torosa, and a number of marine nematodes.
Meiobenthos of some Estonian coastal lakes/Monede Eesti rannikujarvede meiobentosest

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