Gansserina wiedenmayeri

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


Citation: Gansserina wiedenmayeri (Gandolfi, 1955)
Rank: Species
Basionym: Globotruncana wiedenmayeri
Synonyms: Globotruncana bahijae; Globotruncana wiedenmayeri magdalenaensis
Taxonomic discussion: Robaszynski et al., "Globotruncana gansseri dicarinata PESSAGNO, 1960, is put in synonymy with Globotruncana aegyptiaca, as already suggested by Pessagno, 1967." [copied from Chronos database]

Type images:

Original description: Globotruncana wiedenmayeri Gandolfi 1955:

Entries in the Catalog of original descriptions: Globotruncana bahijae;
Globotruncana wiedenmayeri;
Globotruncana wiedenmayeri magdalenaensis;

Emended description: Test flat on the dorsal side ith slightly inflated chambers (generally 6 in the last whorl), convex on the ventral side with chambers strongly inflated and round, 2 finely raised keels close to the dorsal side and to each other, chambers short, petaloid; sutures deeply depressed and radial on the ventral side, with sutural elevations occasionally present in the last chambers. Test rough with spines, papillae and rugose ridges on the ventral side, well developed arched lips (rosetta type) covering the umbilical apertures. Dimensions of holotype: Width 0.78 x 0.89 mm; thichness 0.32 mm [copied from Chronos database]

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. falsostuarti (-Ma, base in stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
umb chamber shape:Trapezoidalcoiling axis:Very lowperiphery:Double keelaperture border:Tegilla
sp chbr shape:Petaloidumbilicus:Wideperiph margin shape:Subangularaccessory apertures:None
umbilical or test sutures:Moderately depressedumb depth:Deepwall texture:Coarsely pustuloseshell porosity:Finely Perforate: 1-2.5┬Ám
spiral sutures:Raised beadeddiameter mm:0.45 to 0.50 mmwidth mm:breadth mm:0.16-0.20
final-whorl chambers:5.0-8.0


Gandolfi, R., (1955). The genus Globotruncana in northeastern Colombia. Bull. Am. Paleontol., 36: 1-118.


Gansserina wiedenmayeri compiled by the pforams@mikrotax project team viewed: 22-1-2018

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