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Globotruncana arca


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncana -> Globotruncana arca
Sister taxa: G. aegyptiaca, G. arca, G. bulloides, G. dupeublei, G. esnehensis, G. falsostuarti, G. hilli, G. lapparenti, G. linneiana, G. mariei, G. neotricarinata, G. orientalis, G. rosetta, G. rugosa, G. ventricosa, G. sp.,

Taxonomy

Citation: Globotruncana arca (Cushman, 1926)
Rank: Species
Basionym: Pulvinulina arca
Synonyms: Globotruncana arcaformis; Globotruncana convexa; Globotruncana goudkoffi; Globotruncana leupoldi

Type images:

Original description: Test biconvex, the periphery truncate, about 7 chambers in the last-formed coil; chambers very distinct; sutures both on the dorsal and ventral sides limbate, on the dorsal side curved, raised above the general surface in a distinctly beaded ornamentation, fusing with the raised periphery, the early sutures often more beaded than later ones, on the ventral side the chambers of the last-formed coil do not extend in to the center, leaving a distinct umbilical area; aperture elongate on the ventral side at the base of the last-formed chamber. Diameter usually less than 1 mm.

Entries in the Catalog of original descriptions: Pulvinulina arca, Globotruncana arcaformis, Globotruncana convexa, Globotruncana goudkoffi, Globotruncana leupoldi

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. asymetrica zone (84.19-86.71Ma, base in Coniacian 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: Globotruncana arca, synonyms included - Globotruncana arca; Globotruncana arcaformis; Globotruncana convexa; Globotruncana goudkoffi; Globotruncana leupoldi; Marginotruncana arcaformis;
  • space-time plot :: Samples map :: Parent: Globotruncana

    Character matrix

    test outline:Subcircularchamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Petaloidcoiling axis:Low-moderateperiphery:Double keelaperture border:Tegilla
    umb chbr shape:umbilicus:Wideperiph margin shape:Subangularaccessory apertures:None
    spiral sutures:Raised beadedumb depth:Deepwall texture:Moderately muricateshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Raised beadedfinal-whorl chambers:6.0-9.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs

    Cushman, J. A. (1926c). Some foraminifera from the Mendez shale of Eastern Mexico. Contributions from the Cushman Foundation for Foraminiferal Research. 2(1): +20+-. gs

    Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

    Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(03-Apr): 145-305. gs


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    Globotruncana arca compiled by the pforams@mikrotax project team viewed: 22-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110154 Go to Archive.is to create a permanent copy of this page - citation notes



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