pforams@mikrotax - Gublerina cuvillieri

Citation: Gublerina cuvillieri Kikoine 1948

Synonyms:

Ventilabrella compressa Van der Sluis 1950
Gublerina glaessneri; Bronnimann & Brown 1953

Original description: Test calcaire, bisérié, subtrangulaire, se développant en éventail. Loges rénifonnes, peu globuleuses, s'étageant des deux côtés du test à la périphérie et laissant vide l'espace intercalaire déprimé; à la parlie supérieure une ou deux loges excentriques sont parfois visibles. Suture; larges, un peu déprimées, arquées, s'arrêtant par un petit renflement au niveau de l'espace non garni de loges. Ouverture à la base des dernières loges; formées, et vers l'intérieur du test, rarement visibles.

Georgescu, Saupe, & Huber. 2009, p.413-414: "Test is flaring and biserial early in ontogeny and multiserial in adult stage. There are up to twenty three chambers in the biserial portion of the test. Chambers are subrectangular with width greater than height. Sutures are depressed and straight to slightly oblique to the test axis of growth. Test compressed in edge view with the earlier portion thicker than the later portion due to the addition of successive layers of calcite. The two rows of biserially arranged chambers are divergent, resulting in the development of a central, subtriangular nonseptate area. Aperture has a medium, high arch situated at the base of the last-formed chamber and is bordered by two thin, wide flanges that extend and attach to the previously formed chamber. Successive flanges merge and border the central nonseptate area. The earlier stage is followed by the progressive chamber, which is the first biaperturate chamber of the test. The progressive chamber is globular to subglobular. The first chamber set consists of four chambers of variable shape. The shape of the chambers in the first multiserial test varies from subglobular to subrectangular, being intermediate between the shape of the progressive chamber and that of the earlier stage. Additional incomplete multiserial chamber sets occasionally occur. The lateral chambers of the multiserial chamber sets are monoaperturate and those of the central part biaperturate. Test surface is ornamented with coarse, irregular areas that can be nodular in appearance or with vestiges of coarse costae and are usually present on the earlier chamber surfaces of the test due to the addition of successive layers of calcite. They are absent in the central part of the test as seen in lateral view, but those of the same chamber are connected across the periphery by transverse keels. Ornamentation in the suture areas is strongly reduced, resulting in a smooth appearance. The surface of the multiserial test presents very low costae, ranging in thickness from 2.8 to 3.6 microns. Test wall is microperforate with pore size ranging between 0.7 and 0.9 microns. The pores are situated between the ornamentation structures." [copied from Chronos database]

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.64-69.27Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. gansseri zone (71.73-73.80Ma, base in Campanian stage). Data source: [copied from Chronos database]

References:

Brönnimann, P. & Brown, N. K. (1953). Observations on some planktonic Heterohelicidae from the Upper Cretaceous of Cuba. Contributions from the Cushman Foundation for Foraminiferal Research. 4(4): 150-156. gs

Cushman, J. A. & Church, C. C. (1929). Some Upper Cretaceous foraminifera from near Coalinga, California. Proceedings of the California Academy of Sciences. 18(16): 497-530. gs

Georgescu, M. D. (1995). Upper Cretaceous Heterohelicidae in the Romanian Western Black Sea offshore. Revista Española de Micropaleontología. 27: 91-106. gs

Georgescu, M. D., Saupe, E. E. & Huber, B. T. (2009). Morphometric and stratophenetic basis for phylogeny and taxonomy in Late Cretaceous gublerinid planktonic foraminifera. Micropaleontology. 54(5): 397-424. gs

Huber, B. T., Tur, N., Self-Trail, J. & MacLeod, K. G. (2022a). Calcareous plankton biostratigraphic fidelity and species richness during the last 10 m.y. of the Cretaceous at Blake Plateau, subtropical North Atlantic. Cretaceous Research. 131: 1-42. gs

Kikoine, J. (1948). Les Heterohelicidae du Crétacé supérieur pyrénéen. Bulletin de la Société Géologique de France. 18(1-3): 15-35. gs

van der Sluis, J. P. (1950). Contributions to the geology of East Seran. In, Rutten, L. & Hotz, W. (eds) Geological, Petrographical and Palaeontological Results of Explorations, carried out from September 1917 till June 1919 in the Island of Ceram. 3(3): 1-66. gs

test outline:	Subtriangular	chamber arrangement:	Multiserial	edge view:	Compressed	aperture:	Multiple
sp chamber shape:	Globular	coiling axis:	N/A	periphery:	N/A	aperture border:	Thin flange
umb chbr shape:	Trapezoidal	umbilicus:	N/A	periph margin shape:	Broadly rounded	accessory apertures:	N/A
spiral sutures:	Moderately depressed	umb depth:	N/A	wall texture:	Coarsely costate	shell porosity:	Macroperforate: >2.5µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	3-5	N.B. These characters are used for advanced search. N/A - not applicable

Gublerina cuvillieri

References:

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