Calcidiscus pataecus
Ancestry: Coccolithophores -> Coccolithales -> Calcidiscaceae -> Calcidiscus -> C. leptoporus group -> Calcidiscus pataecus
Sister taxa: C. gallagheri, C. leptoporus, C. macintyrei, C. pataecus, C. premacintyrei, C. salomonii, C. tropicus,
Short diagnosis: Small to medium (~3-8µm), elliptical Calcidiscus coccoliths with a closed central area.
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Taxonomy:
Citation: Calcidiscus pataecus (Gartner, 1967) de Kaenel & Villa 1996Rank: SpeciesBasionym: Coccolithus pataecus Gartner, 1967Variants:
- C. fuscus (Backman, 1980) Janin, 1987 - similar but smaller
Synonyms: Calcidiscus radiatus (Kamptner, 1954) Martin-Perez & Aguado, 1990 - the type specimen of Coccolithus radiatus Kamptner 1954 is undentifiable but Martin-Perez and Agaudo 1990 proposed that it was a senior synonym of C. pataecus Gartner 1967 and the name has been used in this sense by some authors.
Farinacci & Howe catalog pages: Coccolithus fuscus * Coccolithus pataecus * Coccolithus radiatus *
Short diagnosis: Small to medium (~3-8µm), elliptical Calcidiscus coccoliths with a closed central area.
Geological Range:
Notes: Larger specimens (>5µm) appear in Zone NP25. Only consistently present in the Expedition 320 samples with the best Oligocene preservation suggesting it is susceptible to dissolution (Bown & Dunkley Jones, 2012).
Last occurrence (top): within NN11 zone (5.59-8.29Ma, top in Messinian stage). Data source: Young approx range
First occurrence (base): within NP23 zone (29.62-32.02Ma, base in Rupelian stage). Data source: Bown & Dunkley Jones, 2012
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Histogram - Neptune occurrence data from DSDP and ODP proceedings. Interpret with caution & read these notes
- Taxon plotted: Calcidiscus pataecus, synonyms included - Calcidiscus fuscus; Calcidiscus pataecus; Calcidiscus radiatus; Coccolithus fuscus; Coccolithus pataceus; Coccolithus pataecus; Coccolithus radiatus; Parent: C. leptoporus group
References:Bown, P.R. & Dunkley Jones, T., (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research, 32(2): 3-51.
de Kaenel, E. & Villa, G., (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain Proceedings of the Ocean Drilling Program. Scientific Results, 149: 79-145.
Gartner, S., (1967). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. Paleontological Contributions. University of Kansas, 29: 1-7.
Martin-Perez, J.A. & Aguado, R., (1990). Calcareous nannoplankton from the marine sediments of the lower and middle Miocene in the Lecrin Valley (Internal Zones of the Betic Cordillera). Rev. Soc. Geol. Espana, 3(3-4): 335-344.
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Calcidiscus pataecus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-8-2017
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