Nannotax3 - ntax_cenozoic - Polycrater sp. with lip-like borders Nannotax3 - ntax_cenozoic - Polycrater sp. with lip-like borders

Polycrater sp. with lip-like borders

Classification: ntax_cenozoic -> Coccolith families inc sed -> Alisphaeraceae -> Polycrater phase -> Polycrater sp. with lip-like borders
Sister taxa: A. unicornis POL, A. gaudii POL, C. valliformis POL, P. sp. with lip-like borders, P. sp. minimum, P. sp. with slit, P. sp. ladle-like, P. sp. two petals modified two absent, P. sp.


Citation: Polycrater sp. with lip-like borders Cros & Fortuno 2002
taxonomic rank: Species

Distinguishing features:
Parent taxon (Polycrater phase): Phase with quadrate, cup-like nannoliths
This taxon: Distal cup entire, with wide smooth borders

Farinacci & Howe catalog pages:


"This coccosphere resemble P. galapagensis, but coccoliths are smaller (0.3 to 0.5 μm along the major axis) and have the borders of the larger half bent like lips; the sepal-like parts (proximal side) are small with a very simple structure.' [Cros & Fortuno 2002]

Coccosphere diameter (6-) 8.5- 9.5 (-11.5) μm; coccolith length (0.35-) 0.44-0.48 (-0.55) μm, with very simple sepal-like part ca. 0.4 μm. [Cros & Fortuno 2002]

Search data:
LITHS: nannolith-radiate, quadrate, CA: ca_conjunct, closed,
CSPH: equant, monomorphic,
Lith size: 0->0µm;
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:
First occurrence (base): within No known fossil record modern (0-0Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:


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


Polycrater sp. with lip-like borders compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 10-12-2023

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

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