Ostracoda


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Related to Ostracoda: Cladocera

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.
References in periodicals archive ?
Crustacea: Notostraca Triops granarius (Lucas, 1864) Crustacea: Ostracoda Cyprideis sp.
Keywords: La Fe reservoir, non -- marine ostracoda, Neotropics, ostracoda ecology, environmental and paleoenvironmental indicators.
2000), em um estudo em cultivos de peixes, observarem aumento na densidade de copepodes e ostracodas pelo enriquecimento organico, no presente estudo nao houve mudancas significativas entre os pontos amostrados, nem variacao ao longo do tempo (Figura 3), o que indica novamente que este cultivo nao esta causando enriquecimento organico.
Fresh-water Ostracoda - Fauna of the USSR, crustaceans 2(1).
It appears that Wolbachia is widespread among crustaceans (Isopoda, Ostracoda, Maxillopoda, Amphipoda, Tanaidacea, Cumacea, and Decapoda).
Epoca Item Invierno Primavera I II III I II III Gastropoda T S P A S P Cladocera O O A A A A Chlorophyceae T O A O T A Copepoda T T A T S T Cyanophyceae A A A T O A Bacillariophyceae T T A T T A Insecta T S A S T A Ostracoda T O A S T A Peces A O P A A P Restos vegetales A T O A A T Rotifera T T A T T A Items no clasificados T T A A O A Densidad zooplancton 1625[+ or -]926 9162[+ or -]2635 Rel.
3,4 100 Ostracoda 0,6 10,71 Outros Others 5 89,29 Ovos de resistência Ephippial eggs * Adultos.
A meiobenthoc animal group, Ostracoda, was identified in the samples of macrozoobenthos from the Baltic Sea, and from the rivers and springs studied by Jarvekulg (1979, pp.
On the basis of molecular phylogeny, other researchers (Oakley and Cunningham 2002) have shown that the paired compound eyes of some seed shrimp evolved within an otherwise eyeless group of Ostracoda.
albimanus tuvo una relacion lineal positiva significativa con 10 de las variables comparadas (Hebridae (Heteroptera), Chironomidae (Diptera), Naucoridae (Heteroptera), Odonata, Ostracoda (Crustacea), ancho de la franja de algas, estado de las algas, y precipitacion acumulada antes del muestreo.
For example, using the 75% benthic community abundance measure, the upper harbor is dominated by the polycheate Streblospio benedicti, whereas the lower harbor is dominated by the clam Mulinia lateralis; the outer harbor is dominated by Ostracoda (Nelson et al.