Coronocyclus lordii

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Coronocyclus -> Coronocyclus lordii
Sister taxa: C. nitescens, C. mesostenos, C. baileyi, C. lordii, C. sp.


Citation: Coronocyclus lordii da Gama & Varol 2013
Rank: Species

Distinguishing features: Very large species of Coronocyclus

Original description: Diagnosis: A giant Coronocyclus having very large central opening and narrow shields.

Description: This comparatively large species has birefringent monocyclic distal and proximal shields of equal size and a large central opening. The elements of the distal shield have short spine-like peripheral projections. The shields are smooth but highly birefringent under polarised light.

Farinacci & Howe catalog pages: C. lordii *

Morphology: da Gama & Varol (2013) describe the species as having smooth shields but the illustrated specimens do not seem to show this.

Size: holotype 20µm, size range not given

Search data:
TagsLITHS: placolith, circular, CA: vacant,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 15->25µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN4 zone (14.91-17.95Ma, top in Langhian stage). Data source: da Gama & Varol (2013)
First occurrence (base): within NN4 zone (14.91-17.95Ma, base in Burdigalian stage). Data source: da Gama & Varol (2013)

Plot of occurrence data:


da Gama, R. O. B. P. & Varol, O. (2013). New Late Oligocene to Miocene Species. Journal of Nannoplankton Research. 33(1): 1-12. gs V O


Coronocyclus lordii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

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

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