pforams@mikrotax - Globuligerina oxfordiana subsp. oxfordiana

Globuligerina oxfordiana subsp. oxfordiana


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

Taxonomy

Citation: Globuligerina oxfordiana subsp. oxfordiana Grigelis 1958
Rank: sub-species
Basionym: Globigerina oxfordiana Grigelis 1958
Taxonomic discussion: This subspecies was implicitly created by Gradstein 2017 when he formally reassigned G. calloviana as a sub-species of G. oxfordiana. [see ICZN - nominotypical taxa]

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


Emended description:


Morphology:

Wall type:

Size:

Geological Range:
Last occurrence (top): within Early Tithonian Substage (147.72-152.06Ma, top in Tithonian stage). Data source:
First occurrence (base): within Bajocian Stage (168.28-170.30Ma, base in Bajocian stage). Data source:

Plot of range and occurrence data:

References:

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


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

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110594 Go to Archive.is to create a permanent copy of this page - citation notes



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