Ostracod

Ostracoda
Temporal range: Cambrian to Recent
Ostracod.JPG
Scientific classification
Kingdom:Animalia
Phylum:Arthropoda
Subphylum:Crustacea
Class:Ostracoda
Latreille, 1802

Ostracods are a class of the Crustacea. They are often called seed shrimps because of their appearance.

Some 65,000 species (13,000 of which are living) have been identified.[1]

Ostracods are small crustaceans, typically around 1 millimetre (0.04 in) in size, but varying from 0.2 millimetres (0.0079 in) to 30 mm (1.2 in) in the case of Gigantocypris.

Their bodies are flattened from side to side and protected by a bivalve-like, chitinous or calcareous valve or "shell". The hinge of the two valves is in the upper (dorsal) region of the body.

Marine ostracods live in the zooplankton. Others live in the benthos, on or in the upper layer of the sea floor.

Many ostracods are also found in fresh water. Terrestrial species of Mesocypris are known from humid forest soils of South Africa, Australia, New Zealand and Tasmania.[2] They have a wide range of diets, and the group includes carnivores, herbivores, scavengers, and filter feeders.

Copepods may not be monophyletic.[3] Ostracod taxa are grouped into a Class based on gross morphology (what they look like). Their DNA sequence analysis in their mitochondria has been examined. The results are not clear.[4]

  • references

References

  1. Brusca R.C. and G.J. 2002. Invertebrates.
  2. J. D. Stout (1963). "The Terrestrial Plankton". Tuatara 11 (2): 57–65. http://www.nzetc.org/tm/scholarly/tei-Bio11Tuat02-t1-body-d1.html. 
  3. Richard A. Fortey & Richard H. Thomas (1998). Arthropod relationships. Chapman & Hall. ISBN 9780412754203.
  4. S. Yamaguchi & K. Endo 2003. Molecular phylogeny of Ostracoda (Crustacea) inferred from 18S ribosomal DNA sequences: implication for its origin and diversification. Marine Biology. 143, 23. doi=10.1007/s00227-003-1062-3
Other Languages
العربية: صدفيات
беларуская: Ракушкавыя
català: Ostràcode
Cebuano: Ostracoda
čeština: Lasturnatky
Deutsch: Ostrakoden
English: Ostracod
español: Ostracoda
Esperanto: Ostrakodoj
euskara: Ostrakodo
فارسی: صدفیان
français: Ostracode
galego: Ostrácodos
한국어: 패충류
hrvatski: Dvoljušturci
Bahasa Indonesia: Ostracoda
interlingua: Ostracoda
italiano: Ostracoda
עברית: צדפונאים
Basa Jawa: Ostracoda
ქართული: ნიჟარიანები
latviešu: Gliemeņvēži
lietuvių: Kiautavėžiai
Nederlands: Mosselkreeftjes
日本語: 貝虫
norsk nynorsk: Muslingkreps
oʻzbekcha/ўзбекча: Chigʻanoqlilar
português: Ostracoda
română: Ostracode
русский: Ракушковые
slovenščina: Dvoklopniki
українська: Черепашкові раки
Tiếng Việt: Ostracoda
Winaray: Ostracoda
中文: 介形綱