Nannotax3 - ntax_cenozoic - Emiliania


Classification: ntax_cenozoic -> Isochrysidales -> Noelaerhabdaceae -> Emiliania
Sister taxa: Emiliania, Gephyrocapsa, Pseudoemiliania, Reticulofenestra, Noelaerhabdus, Bekelithella, Pyrocyclus

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Emiliania huxleyi
See generic diagnosis (monospecific)
Emiliania huxleyi A group
Emiliania huxleyi B group

Emiliania sp.
Specimens which cannot be assigned to established species yet


Citation: Emiliania Hay & Mohler, in Hay et al., 1967
Rank: Genus
Type species: Pontosphaera huxleyi Lohmann 1902
Taxonomic discussion: For discussion on use of Emiliania, as opposed to Gephyrocapsa, see the Emiliania huxleyi page.  

Distinguishing features:
Parent taxon (Noelaerhabdaceae): Heterococcoliths with Reticulofenestra-type structure, V-units vestigal, R-units forming grill, both shields, and two-layered tube
This taxon: No bridge, slits between distal shield elements

Farinacci & Howe catalog pages: Emiliania *


Coccoliths with slits between all distal shield, and some proximal shield, elements; no bridge.


Most likely ancestor: Gephyrocapsa - at confidence level 5 (out of 5). Data source: Sugested by many authors, e.g. McIntyre and strongly supported by molecular genetic and data (e.g. Bendif et al. 2014).

Search data:
LITHS: placolith, elliptical, CA: ca_conjunct, grill, vacant,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 2->5µm;
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): in upper part of Ionian Stage (75% up, 0.3Ma, in Ionian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Hay, W. W., Mohler, H. P., Roth, P. H., Schmidt, R. R. & Boudreaux, J. E. (1967). Calcareous nannoplankton zonation of the Cenozoic of the Gulf Coast and Caribbean-Antillean area, and transoceanic correlation. Transactions of the Gulf-Coast Association of Geological Societies. 17: 428-480. gs O

Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs V O


Emiliania compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2022

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

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