Nannotax3 - ntax_cenozoic - Corisphaera


Classification: ntax_cenozoic -> Holococcoliths -> bridged -> Corisphaera
Sister taxa: Corisphaera, Helladosphaera, Homozygosphaera, Poritectolithus, S. anthos HOL

Daughter taxa (time control age-window is: 0-800Ma)
Corisphaera gracilis
BCs tube simple, with 2-layered wall; distal surface open except low, narrow, slightly oblique, s-shaped, bridge.
CFCs bridge extended into short leaf.
Corisphaera sp. type B
Similar to H. cornifera but BCs more delicate and symmetrical, CFCs with less well developed leaf. (zygoliths rather than helladoliths).
Corisphaera tyrrheniensis
Like C. gracilis but with open perforate wall structure, with three concentric cycles (possibly indicating affinities to Zygosphaera).
Corisphaera sp.
Specimens which cannot be assigned to established species


Citation: Corisphaera Kamptner, 1937
Rank: Genus
Type species: Corisphaera gracilis Kamptner, 1937 - fixed by monotypy in Kamptner, 1937

Taxonomic discussion:
Corisphaera has a rather generalised morphology and species concepts in the genus are notoriously problematic

Distinguishing features:
Parent taxon (bridged): Holococcoliths with tube, spanned distally by a bridge
This taxon: Weakly dimorphic; BCs with tube spanned by bridge.
CFCs with taller bridges

Farinacci & Howe catalog pages: Corisphaera *

Biology & life-cycles: Both Syracosphaera orbiculus and Syracosphaera azureaplaneta have been shown to form combination coccospheres with Corisphaera type holococcoliths.

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: bar,
CSPH: equant, elongated, CFC, CROSS-POLARS: R-prominent, T-prominent,
MetricsLith size: 1->1.8µm; Coccosphere size: 4->8µm;
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:


Kamptner, E. (1937b). Neue und bemerkenswerte Coccolithineen aus dem Mittelmeer. Archiv für Protistenkunde. 89: 279-316. gs


Corisphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-9-2021

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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