Catalog - Globorotalia pseudomenardii

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia pseudomenardii Bolli 1957

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globorotalia -> Globorotalia pseudomenardii
Other pages this level: << < G. planocompressa, G. planocompressa evoluta, G. planocompressa planocompressa, G. planoconica, G. planoconvexa, G. platispira, G. pliozea, G. praemargaritae, G. praemenardii, G. praemiocenica, G. praenartanensis, G. praepseudomenardii, G. pseudochapmani, G. pseudocrassa, G. pseudomayeri, G. pseudomenardii, G. pseudomiocenica, G. pseudopachyderma, G. pseudoscitula, G. pseudoscitula elongata, G. pseudospinulosa, G. pshadae, G. pumilio, G. puncticulata padana, G. puncticulata puncticuloides, G. pusilla laevigata, G. pusilla mediterranica, G. pusilla pusilla, G. quadraria, G. quadrata, G. quetra> >>

Globorotalia pseudomenardii

Citation: Globorotalia pseudomenardii Bolli 1957
Rank: Species
Type locality: Trinidad Leaseholds, Ltd., well Guayaguayare 159, Trinidad
Type age (chronostrat): Globorotalia pseudomenardii zone
Type sample (& lithostrat): Guayaguayare 159 well 4,324-4330 feet; Lizard Springs Fm.
Type specimens: Holotype (USNM P5061), paratype (USNM P5062)
Type repository: Washington; USNM

Linked specimens: USNM-5061 USNM-5062

Current identification/main database link: Globanomalina pseudomenardii (Bolli 1957)


Original Description
Shape of test very low trochospiral, biconvex; equatorial periphery elongate, lobate, especially so in large specimens; axial periphery angular with distinct keel. Wall calcareous, perforate, surface smooth. Chambers strongly compressed; about 15, arranged in 3 whorls, the 5 chambers of the last whorl increasing rapidly in size. Sutures on spiral side strongly curved, especially so between last chambers of large specimens, depressed; on umbilical side radial, depressed. Umbilicus shallow, open. Aperture a low arch with a lip; interiomarginal, extraumbilical-umbilical. Largest diameter of holotype 0.34 mm., of figured paratype 0.66 mm.

Size: Largest diameter of holotype 0.34 mm., of figured paratype 0.66 mm.

Etymology: The name has been chosen for the resemblance to small specimens of G. menardii (d'Orbigny), to which it has no genetic relationship, however. G. pseudomenardii becomes extinct at the close of the Paleocene whereas G. menardii appears first in the middle to upper Miocene

Extra details from original publication
Remarks: Globorotalia pseudomenardii Bolli, new species, is closely related to G. ehrenbergi Bolli, new species, from which it apparently developed and from which it is distinguished by its less lobate periphery and less depressed spiral sutures.

References:

Bolli, H. M. (1957d). The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 61-82. gs V O

Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. 1-252. gs


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Globorotalia pseudomenardii compiled by the pforams@mikrotax project team viewed: 22-1-2022

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CONRAD MAHER (NEWPORT BEACH, US)

A name that I do not forget. I was an identifying fossil in the Kheir marls and limestones that were deposited after the Upper Paleocene patch reefs in the Marsa Brega Trough of the Sirte Basin in Libya. It was eventually identified with a marker bed in the correlations in the post reef sediments between the reefs.

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