pforams@mikrotax - Contusotruncana plummerae pforams@mikrotax - Contusotruncana plummerae

Contusotruncana plummerae

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


Citation: Contusotruncana plummerae (Gandolfi, 1955)
Rank: Species
Basionym: Globotruncana fornicata plummerae
Synonyms: Globotruncana fornicata ackermanni; Globotruncana adamsi; Globotruncana fornicata cesarensis; Globotruncana fornicata globulocamerata; Globotruncana wilsoni; Globotruncana lunaris

Type images:

Original description: "Flat or slightly convex on the dorsal side, two keels equally developed, somewhat diverging, peripheral band only slightly oblique to the plane of coiling; four to five chambers in the last whorl, long and arched as in the previous subspecies [Globotruncana fornicata subsp. Manaurensis Gandolfi, 1955] but longitudinally inflated with well-developed median inner marginal depression in the last chambers. On the ventral side, the chambers are usually flat with long, curved raised sutures, but the early ones are occasionally inflated and short, with the marginal elevations disappearing in the radial sutural depressions. The test is dextrally coiled.

Entries in the Catalog of original descriptions: Globotruncana fornicata plummerae, Globotruncana fornicata ackermanni, Globotruncana adamsi, Globotruncana fornicata cesarensis, Globotruncana fornicata globulocamerata, Globotruncana wilsoni, Globotruncana lunaris

Character matrix
test outline:Circularchamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:Double keelaperture border:N/A
umb chbr shape:Crescenticumbilicus:Wideperiph margin shape:Moderately roundedaccessory apertures:None
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 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within R. fructicosa zone (69.18-70.14Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of C. plummerae zone (0% up, 79.2Ma, in Campanian stage). Data source: zonal marker (from Timescale Creator)

Plot of range and occurrence data:


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

Gandolfi, R. (1955). The genus Globotruncana in northeastern Colombia. Bulletins of American Paleontology. 36: 1-118. gs

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O

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


Contusotruncana plummerae compiled by the pforams@mikrotax project team viewed: 30-11-2023

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