pforams@mikrotax - Globuligerina

pforams@mikrotax - Globuligerina pforams@mikrotax - Globuligerina

Globuligerina

Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina
Sister taxa: Conoglobigerina, Globuligerina, Petaloglobigerina

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	Globuligerina avariformis
	Globuligerina balakhmatovae
	Globuligerina bathoniana
	Globuligerina dagestanica
	Globuligerina glinskikhae
	Globuligerina jurassica
	Globuligerina oxfordiana	Globuligerina oxfordiana calloviensis Globuligerina oxfordiana subsp. oxfordiana
	Globuligerina tojeiraensis
	Globuligerina waskowskae
	Globuligerina sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Globuligerina Bignot & Guyader 1971

taxonomic rank: Genus

Type species: Globigerina oxfordiana Grigelis, 1958

Original description: Diagnose. - Sous-genre de Globigerina se differenciant du genre et de ses autres sous-genres par son ouverture virguline, non parfaitement ombilicale et pourvue d'une petite levre.

Famille Globigerinidae. Jurassique superieur- Cretace inferieur(?).

Entries in the Catalog of original descriptions: Globuligerina

Distinguishing features:
Parent taxon (Conoglobigerinidae): Small (<200µm), microperforate wall, 3-4 globose chambers in final wall, aperture umbilical
This taxon: Wall smooth or pustulose but without reticulate pattern

Morphology:

Test trochospiral, low to medium to high spired (H/D ratio varies between 0.5 and 1.5). Mostly 4 and rarely 3–4 or only 3 chambers in the last whorl. Chamber shape globular or somewhat flattened, or may be oblong, elongated in a radial sense. Chambers rarely show an equatorial imperforate band. Apertural shape variable; often a medium to high arch; the arch may be an asymmetrical arch or comma shaped; aperture rarely a slit; aperture position mostly umbilical, but may be slightly extraumbilical. The aperture has a thickened and imperforate rim (lip) that may circle the aperture (as observed in well-preserved G. oxfordiana). Wall microperforate, smooth to pustulose; pustules may be pointed (pseudomuricae), or blunt; pustules may have pore mounds; pustules may fuse to form ridges.

Character matrix
test outline: Lobate chamber arrangement: Trochospiral edge view: Spiroconvex aperture: Umbilical
sp chamber shape: Globular coiling axis: Low-moderate periphery: N/A aperture border: -
umb chbr shape: Globular umbilicus: - periph margin shape: Broadly rounded accessory apertures: None
spiral sutures: Moderately depressed umb depth: - wall texture: Finely pustulose shell porosity: Microperforate: <1µm
umbilical or test sutures: Moderately depressed final-whorl chambers: 0-0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): at top of Early Tithonian Substage (100% up, 145Ma, in Tithonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Bajocian Stage (168.17-170.90Ma, base in Bajocian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Conoglobigerinidae

References:

Bignot, G. & Guyader, J. (1971). Observations nouvelles sur Globigerina oxfordiana Grigelis. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference, Roma 1970. Edizione Tecnoscienza, Roma (1): 79-81. gs

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

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Globuligerina compiled by the pforams@mikrotax project team viewed: 14-9-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110199 Go to Archive.is to create a permanent copy of this page - citation notes

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test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Spiroconvex	aperture:	Umbilical
sp chamber shape:	Globular	coiling axis:	Low-moderate	periphery:	N/A	aperture border:	-
umb chbr shape:	Globular	umbilicus:	-	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Moderately depressed	umb depth:	-	wall texture:	Finely pustulose	shell porosity:	Microperforate: <1µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	0-0	N.B. These characters are used for advanced search. N/A - not applicable