Nannotax3 - ntax_cenozoic - Calyptrosphaera -flat

Calyptrosphaera -flat

Classification: ntax_cenozoic -> Holococcoliths -> flat-topped -> Calyptrosphaera -flat
Sister taxa: Calyptrosphaera -flat, Helicosphaera HOL, Poricalyptra, S. mediterranea HOL type, Zygosphaera

Daughter taxa (time control age-window is: 0-800Ma)
Calyptrosphaera cialdii
Liths with broad flat rim and central depression, hexagonal mesh fabric.
Calyptrosphaera dentata
Liths with broad rim, which rises slightly higher than the central cover; cover with hexagonal mesh fabric; one tooth-like boss on the rim.


Citation: Calytrosphaera -flat
Rank: species group

Distinguishing features:
Parent taxon (flat-topped): Holococcoliths with tube, covered distally by a flat cover
This taxon: 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->0┬Ám;
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 "Holocene" 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: 8-12-2021

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

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