Marginotruncana tarfayaensis

Classification: pf_mesozoic -> Globotruncanidae -> Marginotruncana -> Marginotruncana tarfayaensis
Sister taxa: M. angusticarenata, M. caronae, M. coronata, M. desioi, M. manaurensis, M. marginata, M. paraconcavata, M. pileoliformis, M. pseudolinneiana, M. renzi, M. schneegansi, M. sigali, M. sigmoconcavata, M. sinuosa, M. tarfayaensis, M. undulata, M. sp.,


Citation: Marginotruncana tarfayaensis (Lehmann, 1963)
Rank: Species
Basionym: Globotruncana tarfayaensis

Type images:

Original description: Translated from French: The test is slightly trochospiral, biconvex and with a weakly lobate periphery. About 20 chambers forming 3 whorls. Rapid increase in size for the 6 chambers of the last whorl. On the spiral side, the semicircular or angular sutures of the chambers meet the internal whorl obliquely; they are curved backwards. The last sutures have a tendency to become radial. Six to 7 reniform chambers visible on the umbilical side. The size of the wide umbilicus, is about a 1/3 of the diameter. The aperture is interiomarginal-umbilical in position. The double keel splits into two only toward the septal side.

Entries in the Catalog of original descriptions: Globotruncana tarfayaensis

Geological Range:
Last occurrence (top): within D. asymetrica zone (84.19-86.71Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within M. schneegansi zone (89.91-92.56Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • 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: Marginotruncana tarfayaensis, synonyms included - Globotruncana tarfayaensis; Marginotruncana tarfayaensis;
  • space-time plot :: Samples map :: Parent: Marginotruncana

    Character matrix

    test outline:Subcircularchamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Petaloidcoiling axis:Low-moderateperiphery:Double keelaperture border:Coalescing portici
    umb chbr shape:Crescenticumbilicus:Wideperiph margin shape:Subangularaccessory apertures:
    spiral sutures:Raised beadedumb depth:Shallowwall texture:Smoothshell porosity:Microperforate: <1µm
    umbilical or test sutures:Raised beadedfinal-whorl chambers:6.0-7.0 N.B. These characters are used for advanced search. N/A - not applicable


    Lehmann, R. (1963). Étude des Globotruncanidés du Crétacé supérieur de la province de Tarfaya (Maroc occidental). Notes du Service Géologique du Maroc. 21(156): 133-179. gs :: ::


    Marginotruncana tarfayaensis compiled by the pforams@mikrotax project team viewed: 8-7-2020

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110344 Go to Archive.is to create a permanent copy of this page - citation notes

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