pforams@mikrotax - Guembelitria cenomana pforams@mikrotax - Guembelitria cenomana

Guembelitria cenomana

Classification: pf_mesozoic -> Guembelitriidae -> Guembelitria -> Guembelitria cenomana
Sister taxa: G. cenomana, G. cretacea, G. sergipensis, G. sp.


Citation: Guembelitria cenomana (Keller, 1935)
taxonomic rank: Species
Basionym: Guembelina cenomana

Type images:

Original description: "very small, triserial, with globular chambers, 3-4 chambers in each series, widening evenly toward the apertural end, so that the maximum width of the test is attained in the last three chambers. Sometimes a slight curvature of the spire may be noted with growth of the test. Aperture large, gaping, situated at the base of the inner edge of the final chamber. Surface of the test does not differ in any respect from that of other calcareous forms found with it in the sections studied."

Entries in the Catalog of original descriptions: Guembelina cenomana, Guembelitria harrisi, Guembelitriella graysonensis, Guembelitria kegeli

Character matrix
test outline:Triangularchamber arrangement:Triserialedge view:Spiroconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Shallowwall texture:Pore moundsshell porosity:Microperforate: <1µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3-3 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within W. archaeocretacea zone (93.52-94.03Ma, top in Turonian stage). Data source: [copied from Chronos database]
First occurrence (base): within P. appenninica zone (100.50-101.92Ma, base in Albian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin, SE France). Cretaceous Research. 59: 69-97. gs

Keller, B. M. (1935). Microfauna of the Upper Cretaceous in the Dnjepr-Donets valley and some other adjoining regions. (in Russian). Byulleten Moskovskogo Obshchestva Ispytateley Prirody Otdel Geologicheskiy. 13: 522-558. gs

Kroon, D. & Nederbragt, A. J. (1990). Ecology and paleoecology of triserial planktic foraminifera. Marine Micropaleontology. 16: 25-38. gs

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

Petri, S. (1962). Foraminiferos Cretaceous de Sergipe. Boletim da Faculdade de Filosofia Ciências e Letras, Universidade de São Paulo, Geologia. 265(20): 1-140. gs

Petrizzo, M. R. & Huber, B. T. (2006). Biostratigraphy and taxonomy of late Albian planktonic foraminifera from ODP Leg 171B (western North Atlantic Ocean). Journal of Foraminiferal Research. 36: 166-190. gs

Tappan, H. (1940). Foraminifera from the Grayson formation of Northern Texas. Journal of Paleontology. 14(2): 93-126. gs


Guembelitria cenomana compiled by the pforams@mikrotax project team viewed: 15-7-2024

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Comments (1)

Baikoro Bamori(Ivory Coast)

Satisfait de la mise à disposition de la très bonne description en langue française