Distinguishing features: Cretarhabdids with relatively broad shields and a central area spanned by tapering, broad, axial cross bars that are strongly birefringent with median extinction lines.
Daughter taxa: (blue => in age window 0-800Ma) | ||||
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Like Cruciellipsis cuvillieri cuvillieri but larger (>10 µm) and with small central area |
Taxonomy:
Farinacci & Howe catalog pages: Coccolithus cuvillieri *
Distinguishing features: Cretarhabdids with relatively broad shields and a central area spanned by tapering, broad, axial cross bars that are strongly birefringent with median extinction lines.
Morphology remarks: Fine radial laths occur in the central area in well-preserved specimens
See also: Helenea chiastia - very similar but without the median extinction lines in the cross, or laths in central area;;
Geological Range:
Last occurrence (top): within Late Hauterivian Substage (130.77-133.09Ma, top in Hauterivian stage). Data source: Bown et al. 1998
First occurrence (base): within Early Berriasian Substage (143.57-145.01Ma, base in Berriasian stage). Data source: Bown et al. 1998
Plot of occurrence data:
Bown, P. R. (1992). New calcareous nannofossil taxa from the Jurassic/Cretaceous boundary interval of Sites 765 and 261, Argo Abyssal Plain. Proceedings of the Ocean Drilling Program. Scientific Results. 123: 369-379. gs Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. gs Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs Grün, W. & Allemann, F. (1975). The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae. 68: 147-211. gs Manivit, H. (1966). Sur quelques coccolithes nouveaux du Néocomien. Compte Rendue Sommaire de la Société Géologique de France. 7: 267-268. gs Mutterlose, J. (1992b). Lower Cretaceous nannofossil biostratigraphy off northwestern Australia (Leg 123). Proceedings of the Ocean Drilling Program. Scientific Results. 123: 343-368. gs Thierstein, H. R. (1971). Tentative Lower Cretaceous Calcareous Nannoplankton Zonation. Eclogae Geologicae Helvetiae. 64: 459-488. gs Wind, F. H. & Cepek, P. (1979). Lower Cretaceous calcareous nannoplankton from DSDP Hole 397A (northwest African Margin). Initial Reports of the Deep Sea Drilling Project. 47A: 221-235. gsReferences:
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Cruciellipsis cuvillieri compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-12-2019
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