Taxonomy:
Distinguishing features: Small to medium (~3-8µm), elliptical Calcidiscus coccoliths with a closed central area.
Farinacci & Howe catalog pages: C. pataecus * , C. fuscus * , C. radiatus *
Search data:Tags | LITHS: placolith, elliptical, CA: closed, CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 3->8µm; |
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:
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. gs V O 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. gs V O Gartner, S. (1967a). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. University of Kansas Paleontological Contributions, Papers. 29: 1-7. gs V O 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). Revista de la Sociedad Geológica de España. 3(3-4): 335-344. gsReferences:
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Calcidiscus pataecus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2021
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