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Globuligerina oxfordiana


Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina -> Globuligerina oxfordiana
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 (Grigelis, 1958)
Rank: Species
Basionym: Globigerina oxfordiana

Type images:

Original description: Test trochoid, small, oval in outline, with a lobate contour. On the dorsal side two whorls of the spire are visible, with four chambers in each that adjoin but do not overlap one another. First, early whorl on the dorsal side rises somewhat above the second, later one. Chambers increase gradually in size as added. Sutures linear, straight, deep. On the ventral side the chambers of the last whorl are visible. In the center here is a small umbilicus. Aperture a semilunate opening at the umbilical margin of the last chamber, furnished with a small lip. Wall perforate, rough, calcareous.

Entries in the Catalog of original descriptions: Globigerina oxfordiana

Geological Range:
Last occurrence (top): within Early Tithonian Substage (147.72-152.06Ma, top in Tithonian stage). Data source: Gradstein et al. 2017
First occurrence (base): within Bajocian Stage (168.28-170.30Ma, base in Bajocian 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:Spiroconvexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:N/A
    umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Finely muricateshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Grigelis, A. A. (1958). Globigerina oxfordiana sp. n. – an occurrence of Globigerina in the Upper Jurassic deposits of Lithuania. Nauchnyye Doklady Vysshey Shkoly, Geol-Geogr Nauki. 1958(3): 109-111. gs


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    Globuligerina oxfordiana compiled by the pforams@mikrotax project team viewed: 24-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110203 Go to Archive.is to create a permanent copy of this page - citation notes



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