Cruciplacolithus subrotundus


Classification: Coccolithophores -> Coccolithales -> Coccolithaceae -> Cruciplacolithus -> Cruciplacolithus subrotundus
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 subrotundus Perch-Nielsen, 1969
Rank: Species

Distinguishing features: Circular to subcircular Cruciplacolithus with narrow central area and broad cross-bars.

Farinacci & Howe catalog pages: Cruciplacolithus subrotundus *

Search data:
TagsLITHS: placolith, circular, sub-circular, RIM: psh-bicyclic, CA: cross, cross-axial,
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: 4->8µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of NP5 zone (25% up, 61Ma, in Selandian stage). Data source: Perch-Nielsen 1985, Varol, (1989, fig. 12.4)
First occurrence (base): within NP4 zone (61.51-63.25Ma, base in Danian stage). Data source: Perch-Nielsen 1985

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 subrotundus, synonyms included - Chiasmolithus subrotundus; Coccolithus subrotundus; Cruciplacolithus subrotundus;
  • space-time plot :: Samples map :: Parent: Cruciplacolithus

    References:

    Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs :: view :: open

    Okada, H. & Thierstein, H. R. (1979). Calcareous nannoplankton - Leg 43, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 43: 507-573. gs :: view :: open

    Perch-Nielsen, K. (1969). Die Coccolithen einiger danischer Maastrichtien- und Danienlokalitaten. Dansk Geologisk Forening Meddelelser. 19: 51-68. gs :: ::

    Perch-Nielsen, K. (1977). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs :: view :: open

    Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M. , Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs :: ::

    Varol, O. (1989). Palaeocene calcareous nannofossil biostratigraphy. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications. British Micropalaeontological Society Publication Series. 265-310. gs :: ::


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    Cruciplacolithus subrotundus 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=394 Go to Archive.is to create a permanent copy of this page - citation notes



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