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Globuligerina


Classification: pf_mesozoic -> Conoglobigerinidae -> Globuligerina
Sister taxa: Compactogerina, Conoglobigerina, Globuligerina, Haeuslerina,
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
Taxonomic discussion: In describing the genus Globuligerina, Bignot and Guyader (1971, *236) listed the type species as "Globigerina oxfordiana Grigelis, 1956 emend. Bignot and Guyader, 1966 et 1970 [1971]." This was interpreted as a deliberately misidentified type species by Fuchs (1973, *1193) and by Huddleston (1982, *1572). If so, the species would be recognized as Globuligerina oxfordiana Bignot and Guyader (ICZN Art. 70 (c)), and both G. frequens Fuchs and G. conflicta Huddleston are superfluous names. However, the "emendation" by Bignot and Guyader consisted merely of a modified description based on SEM illustrations of specimens they identified without question as G. (Globuligerina) oxfordiana Grigyalis. Specimens of Globuligerina oxfordiana from the Soviet Kostroma region are seen in SEM (Gorbachik, 1983, *1270) to be identical with those illustrated by Bignot and Guyader from France, as the latter authors had indicated originally, and as was confirmed by Grigyalis and Gorbachik. ('1980, *1309). Grigyalis and Gorbachik (1980) noted that the specimens described as Polskanella oxfordiana by Fuchs, if correctly illustrated, are probably neither conspecific nor congeneric with Globuligerina oxfordiana, as they appear to have relict apertures.
According to Grigyalis and Gorbachik (1980, *1309, p. 25), the type species of Caucasella is referrable to Globuligerina. Although Globuligerina has been variously placed in the Globigerinidae and Favusellidae, it differs in wall character from both.

Type images:

Original description: Globuligerina Bignot and Guyader 1971:

Entries in the Catalog of original descriptions: Globuligerina;

Short diagnosis: Test high to low trochospiral, with two to four whorls of rapidly enlarging globular chambers, umbilicus small, periphery rounded, peripheral outline lobulate, sutures radial, depressed; wall calcareous, hyaline, radial, finely perforate (about 30 pores per 100 μm2), surface with imperforate small tubercles and costellae that rarely have a few pores and may appear cancellate; aperture a high umbilical arch, bordered above by a narrow lip.

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:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

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


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Globuligerina compiled by the pforams@mikrotax project team viewed: 11-12-2017

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