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Coccolithophore (Emiliania huxleyi). The virus particle (pink) attached to the right-hand specimen is approximately 190nm in diameter.
Scientific classification
Domain: Eukaryota
Kingdom: Chromalveolata
Phylum: Haptophyta
Class: Prymnesiophyceae
Order: Isochrysidales,

Coccolithophores (also called coccolithophorids) are single-celled algae, protists and phytoplankton belonging to the division haptophytes. They are distinguished by special calcium carbonate plates (or scales) of unknown purpose called coccoliths (calcareous nannoplankton), which are important microfossils. Coccolithophores are exclusively marine and are found in large numbers throughout the surface euphotic zone of the ocean. An example of a globally-significant coccolithophore is Emiliania huxleyi.

Due to their microscopic size and the broad distribution of many of their taxa, coccoliths have become very popular as index fossils for solving various stratigraphic problems. Microfossils are sensitive indicators of changes in the temperature and salinity of the ocean and sea surface water. The quantitative analysis of calcareous nannoplankton assemblages is being employed to reveal such changes.

See also

  • CLAW hypothesis
  • Emiliania huxleyi virus 86
  • Ocean acidification
  • Phytoplankton
  • Pleurochrysis carterae
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Coccolithophore". A list of authors is available in Wikipedia.
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