pforams@mikrotax - Globuligerina oxfordiana calloviensis

Globuligerina oxfordiana calloviensis

Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina -> Globuligerina oxfordiana -> Globuligerina oxfordiana calloviensis
Sister taxa: G. oxfordiana calloviensis, G. oxfordiana subsp. oxfordiana


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

Emended description:


Wall type:


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: <1µm
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

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 range and occurrence data:


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

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


Globuligerina oxfordiana calloviensis compiled by the pforams@mikrotax project team viewed: 7-10-2022

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