Calyptrosphaera galea

Classification: Coccolithophores -> Holococcoliths -> convex -> Calyptrosphaera galea
Sister taxa: C. sphaeroidea HOL, S. pulchra HOL oblonga type, S. pulchra HOL pirus type, C. divergens, C. galea, C. sp. cf. heimdaliae, C. heimdaliae, C. radiata, Flosculosphaera, Gliscolithus,


Citation: Calyptrosphaera galea Lecal-Schlauder, 1951
Rank: Species

Distinguishing features: Tube high and well-separated from cover; hexagonal mesh fabric

Farinacci & Howe catalog pages: Calyptrosphaera galea *

Morphology remarks: Like C. divergens but tube higher (ca. 7 crystallite layers vs. ca. 5), protrusion broader and rim/distal surface break less distinct. Hexagonal mesh fabric. Not common or widely recognised, but an unambiguous specimen was illustrated by Norris (1985, p. 624).
CFCs with pyramidal boss - similar to those on Syracosphaera pulchra HOL oblonga type and S. pulchra HOL pirus type. [JRY unpubl obs - see image JRY-IODP359-P01-040]

Search data:
TagsLITHS: holococcolith, H: cavate, H: disk-like, elliptical, hollow, RIM: flange-proximal, H: tube (Holos), CA: H: distal-cover, H: distal-cover-domal, H: fabric-hexagonal-mesh, closed, PROCESS: hollow,
CSPH: ovoid, elongated, CFC, CFC+process, polymorphic, V-UNITS: ds-surface, V-prominent, R-UNITS: rim, R-prominent,
MetricsLith size: 2->3µm; Coccosphere size: 10->15µm;
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: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source: [JRY rough estimate]

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: convex


    Lecal-Schlauder, J. (1951). Recherches morphologiques et biologiques sur les Coccolithophorides Nord-Africains. Annales de l'Institut Océanographique, Monaco & Paris. 26: 255-362. gs :: ::

    Norris, R. E. (1985). Indian Ocean nanoplankton. II. Holococcolithophorids (Calyptrosphaeraceae, Prymnesiophyceae) with a review of extant genera. Journal of Phycology. 21: 619-641. gs :: ::


    Calyptrosphaera galea compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-6-2020

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

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