Classification: ntax_cenozoic -> Coccolithales -> Calcidiscaceae -> Oolithotus
Sister taxa: Calcidiscus, Hayaster, Oolithotus, Umbilicosphaera, Cryptococcolithus, Hayella

Daughter taxa (time control age-window is: 0-800Ma)
Oolithotus antillarum
liths small (<5µm), strongly asymmetric
Oolithotus fragilis
liths large (>5µm), weakly asymmetric
Oolithotus sp.
Specimens which cannot be assigned to established species


Citation: Oolithotus Cohen & Reinhardt, 1968
Rank: Genus
Type species: Discolithus antillarum Cohen 1964

Distinguishing features: Coccoliths asymmetric, tube and proximal shield offset from centre of distal shield

Farinacci & Howe catalog pages: Oolithotus *

Morphology: Cells non-motile, but coccosphere asymmetrical with an opening. Coccoliths also asymmetrical, distal shield is typically weakly elliptical but with tube and proximal shield offset from centre, otherwise very like Calcidiscus. Proximal shield small, monocyclic.

Ecology & Biogeography: Predominantly deep-photic.

Search data:
TagsLITHS: placolith, asymmetric, circular, CA: closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 3->9µm; Coccosphere size: 6->20µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Zanclean Stage (0% up, 5.3Ma, in Zanclean stage). Data source: Total of range of species in this database

Plot of occurrence data:


Cohen, C. L. D. & Reinhardt, P. (1968). Coccolithophorids from the Pleistocene Caribbean deep-sea core CP-28. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 131: 289-304. gs


Oolithotus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=956 Go to Archive.is to create a permanent copy of this page - citation notes

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