pforams@mikrotax - Contusotruncana walfischensis pforams@mikrotax - Contusotruncana walfischensis

Contusotruncana walfischensis

Classification: pf_mesozoic -> Globotruncanidae -> Contusotruncana -> Contusotruncana walfischensis
Sister taxa: C. contusa, C. fornicata, C. morozovae, C. patelliformis, C. plicata, C. plummerae, C. walfischensis, C. sp.


Citation: Contusotruncana walfischensis (Todd, 1970)
taxonomic rank: Species
Basionym: Globotruncana walfischensis

Type images:

Original description: "Test high conical with depressed umbilicus; periphery only slightly lobulated, marked by a limbate beaded keel and a secondary keel less strongly developed; chambers distinct, 5 making up the final whorl; early chambers globular, inflated, and tight-coiled, later ones flattened and not inflated; sutures distinct, depressed between the later chambers, curved and oblique on the dorsalside, radiating outward from the umbilicus on the ventral side; wall ornamented by coarse pustules over the initial chambers, later part of test finely spinose between the beaded sutures; aperture unobserved, presumably covered by the umbilical tegilla. Diameter 0.30-0.45 mm; height 0.25-0.32 mm."

Entries in the Catalog of original descriptions: Globotruncana walfischensis

Character matrix
test outline:Subcircularchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Crescenticcoiling axis:Highperiphery:Double keelaperture border:Thin porticus
umb chbr shape:-umbilicus:Wideperiph margin shape:Subangularaccessory apertures:Intralaminal
spiral sutures:Moderately depressedumb depth:Deepwall texture:Finely pustuloseshell porosity:-
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4-5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within P. hantkeninoides zone (66.04-66.39Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. fructicosa zone (69.27-70.14Ma, base in Maastrichtian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(3-4): 145-305. gs

Todd, R. (1970a). Maastrichtian (Late Cretaceous) foraminifera from a deep-sea core off southwestern Africa. Revista Española de Micropaleontología. 2(135-154): -. gs


Contusotruncana walfischensis compiled by the pforams@mikrotax project team viewed: 1-3-2024

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