pforams@mikrotax - Globotruncanita stuarti

Citation: Globotruncanita stuarti (de Lapparent, 1918)

Synonyms: Globotruncana stuarti parva

Original description: Translated from French: Foraminifer belonging to the Family Globigerinidae, consisting of three to four whorls, six to seven chambers per whorl, with a well-marked keel, but without a carinal band. Each chamber is made of two perforate walls , joining one another along the keel and separated from each other by a portion of the imperforate band that shapes a partition in which the aperture is located. The chamber periphery is linear in shape, except that of the first whorl, where the outline in lobate. Chamber walls more or less undulated

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:

Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs O

de Lapparent, J. (1918). de Lapparent, J. (1918). Etude lithologique des terrains cretaces de la region d’Hendaye. Mémoires pour servir à l'explication de la carte géologique détaillée de la France. 1-155. Mémoires pour servir à l'explication de la carte géologique détaillée de la France. 1-155. gs

Huber, B. T., Tur, N., Self-Trail, J. & MacLeod, K. G. (2022a). Huber, B. T., Tur, N., Self-Trail, J. & MacLeod, K. G. (2022). 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. Cretaceous Research. 131: 1-42. gs

Pessagno, E. A. (1967). Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. Palaeontographica Americana. 5: 245-445. gs O

Postuma, J. A. (1971). Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. Elsevier for Shell Group, The Hague. 1-406. gs

Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(3-4): 145-305. Revue de Micropaléontologie. 26(3-4): 145-305. gs

test outline:	Circular	chamber arrangement:	Trochospiral	edge view:	Planoconvex	aperture:	Umbilical
sp chamber shape:	Subrectangular	coiling axis:	Moderate	periphery:	Single keel	aperture border:	Thin porticus
umb chbr shape:	Trapezoidal	umbilicus:	Wide	periph margin shape:	Subangular	accessory apertures:	Infralaminal
spiral sutures:	Raised beaded	umb depth:	Deep	wall texture:	Finely pustulose	shell porosity:	Finely Perforate: 1-2.5µm
umbilical or test sutures:	Raised beaded	final-whorl chambers:	7-9	N.B. These characters are used for advanced search. N/A - not applicable

Globotruncanita stuarti

References:

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