Classification: ntax_cenozoic -> Mesozoic Survivors -> Watznaueriaceae -> Cyclagelosphaera
Sister taxa: Cyclagelosphaera, Tergestiella, Watznaueria

Daughter taxa (time control age-window is: 0-800Ma)
Cyclagelosphaera alta
Cyclagelosphaera with central-plug-forming inner tube cycle that forms a raised conical structure.
Cyclagelosphaera margerelii
Small to medium sized Cyclagelosphaera with closed central area.
Cyclagelosphaera reinhardtii
Cyclagelosphaera with central-plug-forming inner tube cycle that is raised above shield level, forming a raised conical structure.
Cyclagelosphaera rotaclypeata
Cyclagelosphaera with relatively wide central area filled with radial elements.
Cyclagelosphaera sp.
Specimens which cannot be assigned to any established species


Citation: Cyclagelosphaera Noël, 1965
Rank: Genus
Type species: Cyclagelosphaera margerelii Noël, 1965

Distinguishing features: Circular watznaueriacean placolith coccoliths.

Farinacci & Howe catalog pages: Cyclagelosphaera *

Search data:
TagsLITHS: placolith, circular, CA: ca_conjunct,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, R-prominent,
MetricsLith size: 4->8µm; Liths per sphere: 11->13
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 Ypresian Stage (22% up, 54.2Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Bajocian Stage (81% up, 168.7Ma, in Bajocian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

Noël, D. (1965b). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Essai de classification des coccolithes fossiles. Éditions du Centre National de la Recherche Scientifique, Paris. 1-209. gs


Cyclagelosphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-2-2021

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

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