pforams@mikrotax - Contusotruncana contusa pforams@mikrotax - Contusotruncana contusa

Contusotruncana contusa


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

Taxonomy

Citation: Contusotruncana contusa (Cushman, 1926)
taxonomic rank: Species
Basionym: Pulvinulina arca var. contusa
Synonyms: Globotruncana contusa galeoidis; Globotruncana linnei var. caliciformis

Type images:

Original description: Variety differing from the typical in the greater size, much greater elevation of the spire on the dorsal side, and particularly striking the concave appearance of the chambers on the dorsal side, those of one coil coming in line with preceding ones so that the entire test develops something of a pyramidal form.

Entries in the Catalog of original descriptions: Pulvinulina arca contusa, Globotruncana contusa galeoidis, Globotruncana linnei caliciformis

Character matrix
test outline:Subpolygonalchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical
sp chamber shape:Crescenticcoiling axis:Highperiphery:Double keelaperture border:Thick porticus
umb chbr shape:Crescenticumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Intralaminal
spiral sutures:Raised beadedumb depth:Deepwall texture:Finely pustuloseshell porosity:Finely Perforate: 1-2.5µm
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): within R. fructicosa zone (69.27-70.14Ma, 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

Cushman, J. A. (1926c). Some foraminifera from the Mendez shale of Eastern Mexico. Contributions from the Cushman Laboratory for Foraminiferal Research. 2(1): 16-24. gs

Huber, B. T., Tur, N., Self-Trail, J. & MacLeod, K. G. (2022a). Calcareous plankton biostratigraphic fidelity and species richness during the last 10 m.y. of the Cretaceous at Blake Plateau, subtropical North Atlantic. Cretaceous Research. 131: 1-42. 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

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

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


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Contusotruncana contusa compiled by the pforams@mikrotax project team viewed: 21-2-2024

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