Catalog entries: Globorotalia pseudomenardii
Type images:Distinguishing features:
Parent taxon (Globanomalina): Very low trochospiral; 5-6 chambers in final whorl; chamber-shape variable.
Aperture interiomarginal, umbilical-extraumbilical, arch with narrow lip.
Wall smooth, normally perforate, pustules in some species.
This taxon: Test spiroconvex with distinct keel & sharply-angled axial periphery. Umbilicus narrow. 5 (rarely 6) chambers in final whorl.
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Inequally biconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Petaloid | coiling axis: | Very low | periphery: | Single keel | aperture border: | Thin lip |
umb chbr shape: | Subtriangular | umbilicus: | Narrow | periph margin shape: | Subangular | accessory apertures: | None |
spiral sutures: | Weakly depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 5-6 | N.B. These characters are used for advanced search. N/A - not applicable |
Geographic distribution
Aze et al. 2011 summary: Low to middle latitudes; based on Olsson et al. (1999)
Isotope paleobiology
Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light _13C and relatively heavy _18O. Sources cited by Aze et al. 2011 (appendix S3): Olsson et al. (1999)
Phylogenetic relations
Most likely ancestor: Globanomalina ehrenbergi - at confidence level 4 (out of 5). Data source: Olsson et al. 1999, fig 5a.
Geological Range:
Notes: Zone P4. [Olsson et al. 1999]
The FAD of Globanomalina pseudomenardii marks the base of zone P4a / top of P3b (Wade et al. 2011)
Last occurrence (top): at top of P4 zone (100% up, 57.1Ma, in Thanetian stage). Data source: zonal marker (Wade et al. 2011)
First occurrence (base): at base of P4 zone (0% up, 60.7Ma, in Selandian stage). Data source: zonal marker (Wade et al. 2011)
Plot of occurrence data:
Primary source for this page: Olsson et al. 1999 - Atlas of Paleocene Planktonic Foraminifera, p. 45
Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs 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 Ehrenberg, C. G. (1854). Mikrogeologie: Das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbständigen Lebens auf der Erde. Leopold Voss, Leipzig. 1-374. gs Hillebrandt, A. , von (1962). Das Paleozän und seine Foraminiferenfauna im Becken von Reichenhall und Salzburg. Abhandlungen Bayerischen Akademie der Wissenschaften. 108: 1-182. gs Nederbragt, A. J. & van Hinte, J. E. (1987). Biometric Analysis of Planorotalites pseudomenardii (Upper Paleo- cene) at Deep Sea Drilling Site 605, Northwestern Atlantic. Initial Reports of the Deep Sea Drilling Project. 93: 577-592. gs Nocchi, M., Amici, E. & Premoli Silva, I. (1991). Planktonic foraminiferal biostratigraphy and paleoenvironmental interpretation of Paleogene faunas from the subantarctic transect, Leg 114. Proceedings of the Ocean Drilling Program, Scientific Results. 114: 233-273. gs Olsson, R. K., Hemleben, C., Berggren, W. A. & Huber, B. T. (1999). Atlas of Paleocene Planktonic Foraminifera. Smithsonian Institution Press, Washington, DC. (85): 1-252. gs Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs Wade, B. S., Pearson, P. N., Berggren, W. A. & Pälike, H. (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews. 104: 111-142. gsReferences:
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Globanomalina pseudomenardii compiled by the pforams@mikrotax project team viewed: 7-2-2025
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