Nannotax3 - ntax_cenozoic - ntax_cenozoic Nannotax3 - ntax_cenozoic - ntax_cenozoic

Cenozoic and Modern Coccolithophores


Classification: ntax_cenozoic
Sister taxa:

2N - diploid phase characteristics; N - haploid phase characteristics (time control age-window is: 0-800Ma)Granddaughter taxa
Heterococcoliths
Isochrysidales
2N: Mostly placolith heterococcoliths with R-unit dominant. Non-motile
N: non-calcifying, motile, with vestigial haptonema.
Noelaerhabdaceae
Prinsiaceae
Isochrysidaceae

Coccolithales
2N: Mostly placolith heterococcoliths with V-unit forming the distal shield; R-unit the proximal shield. Non-motile
N: Form holococcoliths formed of single block, or non-calcifying
Coccolithaceae
Calcidiscaceae
Hymenomonadaceae
Pleurochrysidaceae

Zygodiscales
2N: Heterococcoliths with V-units forming upper/outer cycle of imbricated elements and R-units forming basal plate and central mass of irregular elements. Usually motile
N: Form holococcoliths formed of single block
Helicosphaeraceae
Pontosphaeraceae
Zygodiscaceae

Syracosphaerales
2N: Coccoliths with radial lath cycle of T-units, and disjunct, often complex, axial structure, coccospheres often polymorphic, usually motile
N: Form holococcoliths, highly variable
Calciosoleniaceae
Rhabdosphaeraceae
Syracosphaeraceae

Coccolith families inc sed
2N: Various heterococcolith groups not obviously related to the well-defined orders
N: mostly unknown
Alisphaeraceae
Papposphaeraceae
Umbellosphaeraceae
narrow rimmed placoliths
Coccolith genera inc sed
Unidentified heterococcoliths

Mesozoic Survivors
Mesozoic taxa which occur in low abundances in the early Palaeogene.
Biscutaceae
Chiastozygaceae
Markalius
Watznaueriaceae

Holococcoliths & Nannoliths
Holococcoliths
Haploid life-cycle stages, with liths formed of numerous rhombohedral microcrystals
tubeless
convex
bridged
flat-topped
septate
open-tube
fossil holococcoliths
Unidentified extant holococcolith

Braarudosphaerales
2N(?) cell covered by pentaliths (plates formed of 5 segments with lamellar sub-structure) formed extracellularly N: cell motile, covered by scales
Braarudosphaeraceae

Discoasterales
Radially symmetrical nannoliths formed from one to several separate cycles of elements that radiate from a common centre or axis.
Discoasteraceae
Fasciculithaceae
Heliolithaceae
Sphenolithaceae

Nannolith families inc sed
Haptophytes forming calcareous structures not obviously homologous with heterococcoliths, holococcoliths, or discoasteralids
Ceratolithaceae
Lapideacassaceae
Lithostromationaceae
Nannolith genera inc sed
Rhomboasteraceae

Taxonomy:

Citation: Coccolithophores informal
taxonomic rank: overall group
Taxonomic discussion:

Distinguishing features:
Parent taxon (images):
This taxon: Extant coccolithophores and Cenozoic calcareous nannofossils - Mesozoic nannofossils are in a separate module

Farinacci & Howe catalog pages: Coccolithophores [no catalog entry yet]

Search data:
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): at top of (100% up, 0Ma, in "Holocene" stage). Data source: Total of ranges of the species in this database
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Bown, P. R. & Young, J. R. (1998a). Introduction - calcareous nannoplankton biology. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 1-15. gs

Young, J. R., Didymus, J. M., Bown, P. R., Prins, B. & Mann, S. (1992). Crystal assembly and phylogenetic evolution in heterococcoliths. Nature. 356: 516-518. gs

Young, J. R. et al. (1997). Guidelines for coccolith and calcareous nannofossil terminology. Palaeontology. 40: 875-912. gs

Young, J. R., Davis, S. A., Bown, P. R. & Mann, S. (1999). Coccolith ultrastructure and biomineralisation. Journal of Structural Biology. 126: 195-215. 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

Young, J. R., Geisen, M. & Probert, I. (2005). A review of selected aspects of coccolithophore biology with implications for palaeobiodiversity estimation. Micropaleontology. 51(4): 267-288. gs


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Cenozoic and Modern Coccolithophores compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-6-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=315 Go to Archive.is to create a permanent copy of this page - citation notes
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Comments (2)

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Zhang Wei(China)

How many nannofossil genus and species in the Cenozoic?

Avatar
Jeremy Young(UK)

Hi

On nannotax we document 180 genera and 1232 species in the Cenozoic ... but of course some of those may be artificial, others have not been described, and there are some papers we have not synthesised yet.

Jeremy