pforams@mikrotax - Globuligerina oxfordiana pforams@mikrotax - Globuligerina oxfordiana

Globuligerina oxfordiana

Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina -> Globuligerina oxfordiana
Sister taxa: G. avariformis, G. balakhmatovae, G. bathoniana, G. dagestanica, G. glinskikhae, G. jurassica, G. oxfordiana, G. tojeiraensis, G. waskowskae, G. sp.
Sub-taxa & variants (time control age-window is: 0-800Ma)
Globuligerina oxfordiana calloviensis

Globuligerina oxfordiana subsp. oxfordiana


Citation: Globuligerina oxfordiana (Grigelis, 1958)
taxonomic 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

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:4-4 N.B. These characters are used for advanced search. N/A - not applicable

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 (168.28-170.3Ma, base in Bajocian stage). Data source: Gradstein et al. 2017

Plot of range and occurrence data:


Gradstein, F. & Waskowska, A. (2021). New insights into the taxonomy and evolution of Jurassic planktonic foraminifera. Swiss Journal of Palaeontology. 140(1): 1-12. gs O

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

Kendall, S., Gradstein, F., Jones, C., Lord, O. T. & Schmidt, D. N. (2020). Ontogenetic disparity in early planktic foraminifers. Journal of Micropalaeontology. 39: 27-39. gs O


Globuligerina oxfordiana compiled by the pforams@mikrotax project team viewed: 8-12-2023

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