pforams@mikrotax - Gansserina gansseri pforams@mikrotax - Gansserina gansseri

Gansserina gansseri

Classification: pf_mesozoic -> Globotruncanidae -> Gansserina -> Gansserina gansseri
Sister taxa: G. gansseri, G. repanda, G. wiedenmayeri, G. sp.


Citation: Gansserina gansseri (Bolli, 1951)
taxonomic rank: Species
Basionym: Globotruncana gansseri
Synonyms: Globotruncana arabica; Globotruncana (Rugotruncana) gansseri dicarinata; Globotruncana gansseri gandolfii; Globotruncana lugeoni; Globotruncana qabeliatensis; Globotruncana gansseri subgansseri; Globotruncana youssefi

Type images:

Original description: "Test flat on dorsal side, ventrally strongly inflated. The chambers of the last whorl, usually five in number, surround a deep umbilicus. The suture lines on the dorsal side are curved and in many cases finely beaded. A distinct marginal keep separates the flat dorsal part from the inflated ventral side. Suture lines of the ventral side are slightly curved, indicating a slight overlapping of chambers. The wall, and particularly the ventral part of it, is somewhat rough or spiny."

Entries in the Catalog of original descriptions: Globotruncana gansseri, Globotruncana arabica, Globotruncana (Rugotruncana) gansseri dicarinata, Globotruncana gansseri gandolfii, Globotruncana lugeoni, Globotruncana qabeliatensis, Globotruncana gansseri subgansseri, Globotruncana youssefi

Character matrix
test outline:Lobatechamber arrangement:Trochospiraledge view:-aperture:Umbilical
sp chamber shape:Subtriangularcoiling axis:Very lowperiphery:Single keelaperture border:Thick porticus
umb chbr shape:Trapezoidalumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Infralaminal
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.5-5.5 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): at base of G. gansseri zone (0% up, 73.8Ma, in Campanian stage). Data source: zonal marker (from Timescale Creator)

Plot of range and occurrence data:


Bolli, H. M. (1951b). The genus Globotruncana in Trinidad. Journal of Paleontology. 25(2): 187-199. gs

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

Smith, C. C. & Pessagno, E. A. (1973). Planktonic foraminifera and stratigraphy of the Corsicana formation (Maestrichtian) North-central Texas. Cushman Foundation for Foraminiferal Research, Special Publication. 12: 1-67. gs O


Gansserina gansseri compiled by the pforams@mikrotax project team viewed: 23-5-2024

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