CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides glomerosa circularis Blow 1956

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerinoides -> Globigerinoides glomerosa circularis
Other pages this level: << < G. bradyi grandis, G. bulloideus, G. cancellata, G. canimarensis, G. conglobatus altihelix, G. consuelensis, G. diminuta, G. dinapolii, G. elongata bikiniensis, G. elongata cedrosensis, G. emeisi, G. eoconglobatus, G. fournieri, G. fragilis, G. glomerosa, G. glomerosa circularis, G. glomerosa curva, G. glomerosa glomerosa, G. haitiensis anterubra, G. haitiensis compactus, G. haitiensis compressus, G. haitiensis epityche, G. haitiensis praerubra, G. haitiensis progomitulus, G. higginsi, G. hurgadaensis, G. hyalinus, G. index, G. indigena, G. inusitatus, G. italicus> >>

Globigerinoides glomerosa circularis

Citation: Globigerinoides glomerosa circularis Blow 1956
Rank: sub-species
Type locality: auger line near Pozon, eastern Falcon, Venezuela
Type age (chronostrat): Siphogenerina transversa zone
Type sample (& lithostrat): sample no. R. M. 19285, T. L. L. Cat. No. 130301, Pozon formation,
Type specimens: USNM 64589
Type repository: Washington, USNM ; paratypes in NHM London and NHM Basel

Linked specimens: USNM-64589 USNM-64590

Current identification/main database link: Praeorbulina circularis (Blow, 1956)


Original Description
Test nearly spherical, with last chamber almost globular, inflated, and embracing the earlier part of the test more than 75 per cent. Dorsal apertures of the penultimate and earlier chambers, and the apertures of the last chamber, are circular or subcircular pore-like openings. Apertures situated in the sutures between the last, penultimate and earlier chamber and not in the area of the last chamber. Sutures less deeply incised than in Globigerinoides glomerosa glomerosa.

Extra details from original publication
Remarks: This subspecies differs from Globigerinoides glomerosa glomerosa in not having discrete, short slit-like apertures, but possessing rounded pore-like apertures. It differs from Orbulina suturalis in that all the apertures are confined to the sutures.

Occurrence: The subspecies ranges from the topmost part of Globigerinatella insueta zone in the Brasso formation, into the overlying Globorotalia fohsi barisanensis subzone in the Cipero and Brasso formations of Trinidad. It probably does not extend into the topmost part of the latter subzone. In Venezuela, it occurs in the middle part of the Siphogenerina transversa zone in the Pozon formation, and it has also been observed in the Bissex Hill formation of Barbados.

References:

Blow, W. H. (1956). Origin and evolution of the foraminiferal genus Orbulina d'Orbigny. Micropaleontology. 2(1): 57-70. gs

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Globigerinoides glomerosa circularis compiled by the pforams@mikrotax project team viewed: 17-1-2021

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