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Globuligerina oxfordiana calloviensis


Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina -> Globuligerina oxfordiana calloviensis
Sister taxa: G. avariformis, G. balakhmatovae, G. bathoniana, G. dagestanica, G. jurassica, G. oxfordiana, G. oxfordiana calloviensis, G. tojeiraensis, G. sp.,

Taxonomy

Citation: Globuligerina oxfordiana subsp. calloviensis Kuznetsova, in Kuznetsova & Uspenskaya 1980
Rank: sub-species
Basionym: Globuligerina calloviensis
Taxonomic discussion: Reclassified as a sub-species of G. oxfordiana by Gradstein (2017), in accordance with a suggestion of Simmons et al. 1997

Type images:

Original description: Translated from Russian: Test small, low trochospiral, subquadratic in contour, convexo-concave in edge view. Spiral side is low convex. Umbilical side is slightly concave. Two whorls with 4 chambers in each one. Chambers very compact in an inner whorl, and become less tightly packed in the last whorl. Periphery rounded and widely-scalloped. Sutures slightly curved, just a little depressed. Aperture umbilical, arched, with thin lip. Umbilicus wide. Test calcareous, porous; pores oval, 0.4 - 1.5 microns in size, 25-35 pores in 100 square microns area. Surface covered with pustules and cells. Cells separated by pustules and ridges, and irregular in shape.

Entries in the Catalog of original descriptions: Globuligerina calloviensis

Geological Range:
Last occurrence (top): within Early Kimmeridgian Substage (154.73-157.25Ma, top in Kimmeridgian stage). Data source: Gradstein et al. 2017
First occurrence (base): within Callovian Stage (163.47-166.07Ma, base in Callovian stage). Data source: Gradstein et al. 2017

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

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Globuligerina

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Concavo-convexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Moderateperiphery:N/Aaperture border:N/A
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:N/A
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Microperforate: <1┬Ám
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Gradstein, F. M. (2017a). New and emended species of Jurassic planktonic foraminifera. Swiss Journal of Palaeontology. 136(2): 161-185. gs

    Kuznetsova, K. I. & Uspenskaya, E. A. (1980). Novie nakhodki planktonnikh foraminifer v verkhneyurskikh otlozhenii Krima [New finds of planktonic Foraminifera in the Upper Jurassic deposits of the Crimea]. Doklady Akademii Nauk SSSR. 254(3): 748-752. gs


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    Globuligerina oxfordiana calloviensis compiled by the pforams@mikrotax project team viewed: 20-8-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110202 Go to Archive.is to create a permanent copy of this page - citation notes



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