Taxonomy:
Distinguishing features:
Parent taxon (Cyclagelosphaera): Circular watznaueriacean placolith coccoliths.
This taxon: Cyclagelosphaera with central-plug-forming inner tube cycle that forms a raised conical structure.
Farinacci & Howe catalog pages: C. alta *
Morphology:
Size:
Ecology & Biogeography
Biology & life-cycles
Phylogenetic relations
LITHS: placolith, circular, CA: ca_conjunct, process, closed, CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, R-prominent, |
Lith size: 5->7µm; Coccosphere size: 10->16µm; Liths per sphere: 11->13 Data source notes: morphom data from illustrated specimens |
Geological Range:
Last occurrence (top): in lower part of NP3 zone (40% up, 64.2Ma, in Danian stage). Data source: Varol, 1989, fig. 12.4
First occurrence (base): within NP1 zone (65.47-66.04Ma, base in Danian stage). Data source: Perch-Nielsen 1985
Plot of occurrence data:
Bown, P. R., Gibbs, S. J., Sheward, R., O’Dea, S. & Higgins, D. (2014). Searching for cells: the potential of fossil coccospheres in coccolithophore research. Journal of Nannoplankton Research. 34(S): 5-21. gs V O Bybell, L. M. & Self-Trail, J. (1995). Evolutionary, biostratigraphic and taxonomic study of calcareous nanofossils from a continuous Palaeocene-Eocene boundary section in New Jersey. U.S. Geological Survey, Professional Paper. 1554: 1-36. gs O Mai, H. (2001). New coccolithophorid taxa fom the Guelhemmerberg airshaft. Lower Paleocene, The Netherlands. Micropaleontology. 47: 144-154. gs Mai, H., von Salis, K., Willems, H. & Romein, A. J. T. (1997a). Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands. Micropaleontology. 43: 281-303. gs Mai, H., Hillebrandt-Habel, T., von Salis Perch-Nielsen, K. & Willems, H. (1998). Paleocene coccospheres from DSDP Leg 39, Site 356, Sao Paulo Plateau, S. Atlantic Ocean. Journal of Nannoplankton Research. 20(1): 21-29. gs V O Perch-Nielsen, K. (1979a). Calcareous nannofossil zonation at the Cretaceous/Tertiary boundary in Denmark. In, Birkelund, T. & Bromley, R. G. (eds) Proceedings Cretaceous-Tertiary Boundary Events Symposium, Copenhagen, 1. Copenhagen 115-135. gs O Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs Romein, A. J. T., Willems, H. & Mai, H. (1996). Calcareous nannoplankton of the Geulhemmerberg K/T boundary section, Maastrichtian type area, the Netherlands. Geologie en Mijnbouw. 75: 231-238. gs Varol, O. (1989c). Palaeocene calcareous nannofossil biostratigraphy. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 265-310. gs V O Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 200-224. gs V OReferences:
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Cyclagelosphaera alta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 31-1-2023
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=403 Go to Archive.is to create a permanent copy of this page - citation notes |
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