Taxonomy
Original description: "This form is similar to the preceding G. canaliculata (Reuss) description except that the ventral side is convex instead of flat. Diameter of type specimen, 0.6 mm; thickness, 0.25 mm."
Entries in the Catalog of original descriptions: Globotruncana canaliculata ventricosa, Globotruncana lobata
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | Umbilical |
sp chamber shape: | Petaloid | coiling axis: | Low | periphery: | Double keel | aperture border: | Tegilla |
umb chbr shape: | Inflated | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | Intralaminal |
spiral sutures: | Raised beaded | umb depth: | Deep | wall texture: | Finely pustulose | shell porosity: | |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 5-9 | 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 Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. 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 White, M. P. (1928). Some Index Foraminifera of the Tampico Embayment Area of Mexico. Journal of Paleontology. 2(3): 177-215. gs References:
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Globotruncana ventricosa compiled by the pforams@mikrotax project team viewed: 16-2-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110176 Go to Archive.is to create a permanent copy of this page - citation notes |
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