Taxonomy
Original description: dont on peut se demander si c'est une G. stuarti à test biconvexe ou plus vraisemblablement une G. rosetta différenciée par la forme, la taille et le nombre des loges.
Translated from French: One may wonder whether this species is a Globotruncana stuarti (de Lapparent) [Rosalina stuarti, 1918] with a biconvex test or more likely a Globotruncana rosetta (Carsey) [Globigerina rosetta, 1926] but differing by its shape, its size and the number of chambers.
Entries in the Catalog of original descriptions: Globotruncana falsostuarti
Emended description:
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Umbilical |
sp chamber shape: | Petaloid | coiling axis: | Moderate | periphery: | Double keel | aperture border: | Tegilla |
umb chbr shape: | Trapezoidal | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | Intralaminal |
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: | 7-8 | N.B. These characters are used for advanced search. N/A - not applicable |
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. ventricosa zone (76.18-79.20Ma, base in Campanian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs O Postuma, J. A. (1971). Manual of planktonic foraminifera. 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). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(3-4): 145-305. gs Sigal, J. (1952). Apercu stratigraphique sur la micropaleontologie du Cretace. XIX Congr. géol. internat., Algers, Monographies Regionales. 1(26): 3-43. gsReferences:
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Globotruncana falsostuarti compiled by the pforams@mikrotax project team viewed: 16-2-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110160 Go to Archive.is to create a permanent copy of this page - citation notes |
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