Taxonomy:
Distinguishing features:
Parent taxon (Acanthoica): Body coccoliths with well-developed radial lath cycle, low mound in centre; coccospheres polymorphic, usually some coccoliths with well-developed spines
This taxon: Coccoliths irregularly elliptical; single well-developed radial lath cycle and discrete central protrusion formed numerous very small elements.
Farinacci & Howe catalog pages: S. cohenii *
Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process, CROSS-POLARS: R-prominent, |
Lith size: 2->3µm; Data source notes: lith size from ODs and illustrated specimens (BC width) |
Geological Range:
Last occurrence (top): within NN6 zone (11.90-13.53Ma, top in Serravallian stage). Data source: Galovic & Young 2012
First occurrence (base): within NN6 zone (11.90-13.53Ma, base in Serravallian stage). Data source: Galovic & Young 2012
Plot of occurrence data:
Aubry, M. -P. (1999). Handbook of Cenozoic calcareous nannoplankton. Book 5: Heliolithae (Zygoliths and Rhabdoliths). Micropaleontology Press, American Museum of Natural History, New York. 1-368. gs Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs Galovic, I. & Young, J. R. (2012). Revised taxonomy of some Middle Miocene calcareous nannofossils in the Paratethys. Micropaleontology. 58(4): -. gs Jerkovic, L. (1971f). Syracosphaera cohenii nov. sp. des coccolithophorides du Miocene de la Yougoslavie. Bulletin Scientifique, Yougoslavie. A16: 203-204. gs References:
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Acanthoica cohenii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=9 Go to Archive.is to create a permanent copy of this page - citation notes |
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