Taxonomy
Original description: Test flat on the dorsal side with slightly inflatedchambers (generally six in the last whorl) convex on the ventralside with chambers strongly inflated and round, two finely raisedkeels close to the dorsal side and to each other, chambers short, petaloid; sutures, deep depressed, and radial on the ventral sidewith sutural elevations occasionally present m the last chambers. Test rough with spines, papillae, rugose ridges on the ventral side,developed arched lips (rosetta type) covering the umbilical aper-tures.
Entries in the Catalog of original descriptions: Globotruncana wiedenmayeri, Globotruncana bahijae, Globotruncana wiedenmayeri magdalenaensis
Emended description:
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Planoconvex | aperture: | Umbilical |
sp chamber shape: | Petaloid | coiling axis: | Very low | periphery: | Double keel | aperture border: | Tegilla |
umb chbr shape: | Trapezoidal | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | None |
spiral sutures: | Raised beaded | umb depth: | Deep | wall texture: | Coarsely pustulose | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 5-8 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): near top of P. hariaensis zone (90% up, 66.5Ma, in Maastrichtian stage). Data source: Huber et al. 2022
First occurrence (base): in lower part of P. palpebra zone (20% up, 71.4Ma, in Maastrichtian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Gandolfi, R. (1955). Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. Bulletins of American Paleontology. 36: 1-118. 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 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. gsReferences:
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Gansserina wiedenmayeri compiled by the pforams@mikrotax project team viewed: 12-5-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110115 Go to Archive.is to create a permanent copy of this page - citation notes |
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