Nannotax3 - ntax_cenozoic - Corisphaera sp. type B <title>Nannotax3 - ntax_cenozoic - Corisphaera sp. type B

Corisphaera sp. type B

Classification: ntax_cenozoic -> Holococcoliths -> bridged -> Corisphaera -> Corisphaera sp. type B
Sister taxa: C. gracilis, C. sp. type B, C. tyrrheniensis, C. sp.


Citation: Corisphaera sp. type B Kleijne, 1991
Rank: type

Distinguishing features:
Parent taxon (Corisphaera): Weakly dimorphic; BCs with tube spanned by bridge.
CFCs with taller bridges

This taxon: Similar to H. cornifera but BCs more delicate and symmetrical, CFCs with less well developed leaf. (zygoliths rather than helladoliths).

Farinacci & Howe catalog pages:



Ecology & Biogeography

Biology & life-cycles
Cros et al. (2000) documented a possible association with Syracosphaera delicata, but this association is still unproven.

Phylogenetic relations

Search data:
LITHS: holococcolith, elliptical, hollow, CA: bar,
CSPH: equant, elongated, CFC, CROSS-POLARS: R-prominent, T-prominent,
Lith size: 1->1.3µm; Coccosphere size: 4->6µm; Liths per sphere: 60->80
Data source notes: lith size from Kleijne 1991; csph size from illustraed specimens; lith numbers from quick count on 1 coccosphere
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 "Holocene" stage). Data source: [JRY rough estimate]

Plot of occurrence data:


Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs V O

Cros, L., Kleijne, A., Zeltner, A., Billard, C. & Young, J. R. (2000b). New examples of holococcolith-heterococcolith combination coccospheres and their implications for coccolithophorid biology. In, Young, J. R., Thierstein, H. R. & Winter, A. (eds) Nannoplankton ecology and palaeocology, Proceedings of the INA7 conference, Puerto Rico, February 1998. Marine Micropaleontology . 39(1-4): 1-34. gs

Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research. S1: 1-132. gs V O


Corisphaera sp. type B compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-1-2023

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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