Calyptrosphaera -flat

Classification: Coccolithophores -> Holococcoliths -> flat-topped -> Calyptrosphaera -flat
Sister taxa: Calyptrosphaera -flat, Coronosphaera HOL type, Helicosphaera HOL, Poricalyptra, Zygosphaera,

Daughter taxa: (blue => in age window 0-800Ma)
Liths with broad flat rim and central depression, hexagonal mesh fabric.
Liths with broad rim extnding above cenral cover; cover with hexagonal mesh fabric; one tooth-like boss on the rim.


Citation: Calytrosphaera -flat
Rank: species group

Distinguishing features: Monomorphic - cavate
Coccoliths with broad rim and recessed distal cover without boss

Farinacci & Howe catalog pages: Calyptrosphaera -flat [no catalog entry yet]

Search data:
MetricsLith size: 0->0µm;
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 top of No known fossil record modern (100% up, 0Ma, in stage). Data source: Total of range of species in this database

Plot of occurrence data:



Calyptrosphaera -flat compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-7-2020

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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