Calculites obscurus


Classification: Mesozoic -> Holococcoliths -> Common genera -> Calculites -> Calculites obscurus
Sister taxa: C. additus, C. anfractus, C. axosuturalis, C. cenomanicus, C. cyclops, C. favosus, C. juliae, C. maghredaswampensis, C. obscurus, C. ovalis, C. paulus, C. percernis, C. proscissus, C. rosalyniae, C. turonicus, C. sarstedtensis, C. suturus, C. sp.,

Distinguishing features: Calculites with four blocks divided along broadly diagonal sutures.


Taxonomy:

Citation: Calculites obscurus (Deflandre, 1959) Prins & Sissingh in Sissingh, 1977
Rank: Species
Basionym: Tetralithus obscurus Deflandre, 1959
Synonyms: Phanulithus obscurus

Farinacci & Howe catalog pages: Tetralithus obscurus *

Distinguishing features: Calculites with four blocks divided along broadly diagonal sutures.

Geological Range:
Notes: FCO near Coniacian/Santonian boudary (UC11c) in N. Europe and Indian Ocean (Burnett 1998)
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian stage). Data source: Burnett 1998

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: Calculites obscurus, synonyms included - Calculites obscurus; Phanulithus obscurus; Tetralithus obscurus;
  • space-time plot :: Samples map :: Parent: Calculites

    References:

    Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. The University of Kansas Paleontological Contributions. Article 51 (Protista 2): 1-79. gs

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

    Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs

    Farhan, A. J., Burnett, J. A., Bown, P. R. & Lord, A. R. (1994). Holococcoliths from the Upper Cretaceous of Alabama and Mississippi (USA). Cahiers de Micropaleontologie. 9(57-73): -. gs

    Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs

    Linnert, C., Mutterlose, J. & Erbacher, J. (2010). Calcareous nannofossils of the Cenomanian/Turonian boundary interval from the Boreal Realm (Wunstorf, northwest Germany). Marine Micropaleontology. 74: 38-58. gs

    Perez-Rodriguez, I., Lees, J. A., Larasoaña, J. C., Arz, J. A. & Arenillas, I. (2012). Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain. Cretaceous Research. 37: 100-126. gs

    Sissingh, W. (1977). Biostratigraphy of Cretaceous calcareous nannoplankton. Geologie en Mijnbouw. 65(1): 37-65. gs

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 30(1): 39-56. gs


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    Calculites obscurus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10172 Go to Archive.is to create a permanent copy of this page - citation notes



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