coccolith

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Related to Coccoliths: Coccosphere, Acritarchs

coccolith

[′käk·ə‚lith]
(botany)
One of the small, interlocking calcite plates covering members of the Coccolithophorida.
References in periodicals archive ?
Oxygen isotope analyses of coccoliths grown in culture: species dominant in Pleistocene-Holocene nannofossil assemblages.
He was fed up of all the coccoliths teasing him for being tiny, as if he wasn't already tiny enough.
Distribution of coccoliths in surface sediments of the south-eastern South Atlantic Ocean: ecology, preservation and carbonate contribution.
calcite (independent variables) and coccolithophore concentration, number of species, and percentage of malformed and corroded coccoliths (dependent variables).
Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphic zonation (Bukry, 1973, 1975).
Coccoliths are formed almost exclusively of calcium carbonate, as most magnesium is expelled by metabolic processes within the cells, whereas foraminiferal shells contain a much higher concentration of magnesium.
Diatoms fix carbon dioxide, but produce little DMS, whereas coccoliths produce DMS, but also release carbon dioxide.
Scientists could not understand why coccoliths, the delicately architectured calcite shells of phytoplankton, only several micrometers in size, were preserved on the deep ocean floor just beneath the area where they were produced.
These coverings of highly figured coccoliths are produced during photosynthesis and shed occasionally during the life of the cell and at cell death.
The researchers were therefore surprised to discover that foraminiferan tests sampled from the Challenger Deep contained calcareous components, including the dissolved remnants of coccoliths, the calcium carbonate plates of tiny algae called coccolithophores, and planktonic foraminiferan test fragments.
Fecal pellets contained primarily skeletal remains of pelagic phytoplankton: coccolithophores, individual coccoliths, and diatom frustules (identified via scanning electron microscopy).