nmn

Globuligerina


Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina
Sister taxa: Conoglobigerina, Globuligerina,
Daughter taxa: (blue => in age window 0-300Ma)








Specimens which cannot be assigned to established species

Taxonomy

Citation: Globuligerina Bignot and Guyader 1971
Rank: Genus
Basionym: Globigerina oxfordiana
Type species: Globigerina oxfordiana Grigelis, 1958

Type images:

Original description: Globuligerina Bignot and Guyader 1971:

Entries in the Catalog of original descriptions: Globuligerina;

Distinguishing features: Wall smooth or pustulose but without reticulate pattern


Test 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.

Geological Range:
Last occurrence (top): within Tithonian Stage (145.01-152.06Ma, top in Tithonian stage). Data source: Total of range of species in this database
First occurrence (base): within Bathonian Stage (166.07-168.28Ma, base in Bathonian stage). Data source: Total of range of species in this database

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

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
umb chamber shape:Globularcoiling axis:Low-moderateperiphery:N/Aaperture border:
sp chbr shape:Globularumbilicus:periph margin shape:Broadly roundedaccessory apertures:None
umbilical or test sutures:Moderately depressedumb depth:wall texture:Finely pustuloseshell porosity:Microperforate: <1µm
spiral sutures:Moderately depresseddiameter mm:width mm:breadth mm:
final-whorl chambers:0.0-0.0

References:

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

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.

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


logo

Globuligerina compiled by the pforams@mikrotax project team viewed: 22-9-2018

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



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics