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Globotruncanella pschadae


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncanella -> Globotruncanella pschadae
Sister taxa: G. compressiformis, G. havanensis, G. minuta, G. petaloidea, G. pschadae, G. semsalensis, G. sp.

Taxonomy

Citation: Globotruncanella pschadae (Keller, 1946)
Taxonomic rank: species
Basionym: Globorotalia pschadae
Synonyms:
Taxonomic discussion: Robaszynski et al., 1984: "Usually, Globotruncanella pschadae (=Globotruncanella citae) was put in synonymy with Globtruncanella havanensis. Examination of the holotype of Globotruncanella havanensis has convinced us that there are enough criteria to separate the two species (pschadae has an angular periphery marked by a keel)."

Type images:

Original description: "Test very large, trochoid, with 2.5-3 volutions and with 5 chambers in the final volution. Sutures clearly defined, deeply depressed on the ventral side, straight on the dorsal side, thickened and arched in the early stages. Keel distinctly expressed, slightly serrate. Wall finely roughened. Aperture begins in the wide umbilical region and extends along the base of the final chamber.

Entries in the Catalog of original descriptions: Globorotalia pshadae, Praeglobotruncana mattsoni, Globotruncanella piramidalis, Globotruncana citae

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:Spiroconvexaperture:-
sp chamber shape:Petaloidcoiling axis:Moderate-highperiphery:Imperforate bandaperture border:Thin porticus
umb chbr shape:-umbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Deepwall texture:-shell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.5-5 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 Maastrichtian Stage (66.04-72.17Ma, base in Maastrichtian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs O

Keller, B. M. (1946). Foraminifera of the Late Cretaceous deposits of the Sochi region. Byulleten Moskovskogo Obshchestva Ispytateley Prirody Otdel Geologicheskiy. 21: 83-108. 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

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Globotruncanella pschadae compiled by the pforams@mikrotax project team viewed: 21-1-2025

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