Falzoni et al 2016 f05-09.JPG
Pessagno 1967 pl48 12.JPG
Pessagno 1967 pl48 13.JPG
Petrizzo and Huber 2006_1f1-109.JPG
ODP Site 1050-109.JPG
Falzoni et al 2016 f05-09.JPG
Pessagno 1967 pl48 12.JPG
Pessagno 1967 pl48 13.JPG
Petrizzo and Huber 2006_1f1-109.JPG
ODP Site 1050-109.JPGTaxonomy
x: G. cenomanaOriginal 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: | Triangular | chamber arrangement: | Triserial | edge view: | Spiroconvex | aperture: | Umbilical |
| sp chamber shape: | Globular | coiling axis: | High | periphery: | N/A | aperture border: | Thin lip |
| umb chbr shape: | Globular | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | None |
| spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Pore mounds | shell porosity: | Microperforate: <1µm |
| umbilical or test sutures: | Moderately depressed | final-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. gsReferences:
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Guembelitria cenomana compiled by the pforams@mikrotax project team viewed: 11-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110219 Go to Archive.is to create a permanent copy of this page - citation notes |
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Comments (1)
Satisfait de la mise à disposition de la très bonne description en langue française