Cruciplacolithus asymmetricus


Classification: Coccolithophores -> Coccolithales -> Coccolithaceae -> Cruciplacolithus -> Cruciplacolithus asymmetricus
Sister taxa: C. neohelis, C. kanungoi, C. cruciformis, C. flavius, C. klausii, C. nishii, C. tarquinius, C. asymmetricus, C. edwardsii, C. frequens, C. intermedius, C. primus, C. subrotundus, C. tenuis, C. filigranus, C. inseadus, C. latipons, C. sp.,

Taxonomy:

Citation: Cruciplacolithus asymmetricus van Heck & Prins, 1987
Rank: Species

Distinguishing features: Moderate to large Cruciplacolithus with slightly rotated (<20 degrees) cross-bars.

Farinacci & Howe catalog pages: Cruciplacolithus asymmetricus *

Search data:
TagsLITHS: placolith, elliptical, RIM: psh-bicyclic, CA: cross, cross-diagonal-asym, diagonal cross,
CSPH: spherical, equant, monomorphic, V-UNITS: distal shield, px-tube, V-prominent, R-UNITS: c-str, ds-tube, prox shield, R-prominent, DETAILS: ca_disjunct, rim-bicyclic, isogyres oblique,
MetricsLith size: 7->12µm;
Sources: lith size from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP4 zone (61.51-63.25Ma, top in Selandian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP2 zone (64.81-65.47Ma, base in Danian stage). Data source: [PRB rough estimate]

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Cruciplacolithus asymmetricus, synonyms included - Cruciplacolithus asymmetricus;
  • space-time plot :: Samples map :: Parent: Cruciplacolithus

    References:

    Bown, P. R. (2005). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs :: view :: open

    Pospichal, J. J. & Wise, S. W. (1990). Calcareous nannofossils across the K/T boundary, ODP hole 690C, Maud Rise, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 515-532. gs :: view :: open

    van Heck, S. E. & Prins, B. (1987). A refined nannoplankton zonation for the Danian of the Central North Sea. Abhandlungen der Geologischen Bundesanstalt. 39: 285-303. gs :: view :: open

    Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs :: ::


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    Cruciplacolithus asymmetricus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=379 Go to Archive.is to create a permanent copy of this page - citation notes



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