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:

    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

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


    nannotaxlogo400px

    Calculites obscurus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-7-2019

    Taxon Search:
    Advanced Search

    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



    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics