Nannotax3 - ntax_cenozoic

Oolithotus

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

Taxonomy:

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:

Tags	LITHS: placolith, asymmetric, circular, CA: closed, CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
Metrics	Lith 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:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Calcidiscaceae

References:

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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