C. biparteoperculatus group

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Coccolithus -> C. biparteoperculatus group
Sister taxa: C. pelagicus group, C. formosus group, C. biparteoperculatus group, C. gigas group, C. sp.

Daughter taxa (time control age-window is: 0-800Ma)
Coccolithus biparteoperculatus
Like Coccolithus pelagicus but the tube cycle may be indistinct and the narrow central area is filled by a two-part oval bar with a transverse suture.
Coccolithus cachaoi
Medium to large elliptical Coccolithus with narrow central area filled or almost filled by a broad transverse disjunct bar.
Coccolithus scheri
Small to medium-sized elliptical Coccolithus with narrow central area filled by a birefringent broad, oval transverse bar, which is bright at around 45° to the polarizing direction.


Citation: Coccolithus biparteoperculatus group
Rank: species group
Taxonomic discussion: informal grouping of similar species, which may not be closely related

Distinguishing features: Central area filled by broad bar

Farinacci & Howe catalog pages:

Search data:
MetricsLith size: 3->12┬Ám;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of Chattian Stage (25% up, 26.8Ma, in Chattian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Ypresian Stage (28% up, 53.7Ma, in Ypresian stage). Data source: Total of range of species in this database

Plot of occurrence data:



C. biparteoperculatus group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=163 Go to Archive.is to create a permanent copy of this page - citation notes

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