Taxonomy
Original description: "Test free, in a medium to high trochospiral coil of two and one-half to three volutions, all visible on the elevated spiral side, only the five to six or rarely seven chambers of the final whorl visible around the deep and broad umbilicus of the opposite side; chambers increasing gradually in size; sutures distinct, deeply constricted, radial to gently curved; wall calcareous, distinctly perforate, surface promionently spinose; aperture an arch opening into the umbilicus and bordered by a distinct lip, with the lips of earlier chambers occasionally preserved around the umbilicus. Greatest diameter of holotype 0.37 mm., thickness 0.33 mm. Paratypes range from 0.34 to 0.49 mm. in diameter.
Entries in the Catalog of original descriptions: Hedbergella brittonensis
Character matrix
| test outline: | Circular | chamber arrangement: | Trochospiral | edge view: | Spiroconvex | aperture: | Umbilical-extraumbilical |
| sp chamber shape: | Globular | coiling axis: | Moderate-high | periphery: | N/A | aperture border: | Thin lip |
| umb chbr shape: | Globular | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | None |
| spiral sutures: | Strongly depressed | umb depth: | Deep | wall texture: | Moderately muricate | shell porosity: | |
| umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 5-6 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Geological Range:
Last occurrence (top): within H. helvetica zone (92.51-93.52Ma, top in Turonian stage). Data source: [copied from Chronos database]
First occurrence (base): within W. archaeocretacea zone (93.52-94.03Ma, base in Cenomanian 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 Huber, B. T., Petrizzo, M. R., Watkins, D. K., Haynes, S. J. & MacLeod, K. G. (2017a). Correlation of Turonian continental margin and deep-sea sequences in the subtropical Indian Ocean sediments by integrated planktonic foraminiferal and calcareous nannofossil biostratigraphy. Newsletters on Stratigraphy. 50: 141-185. gs Loeblich, A. R. & Tappan, H. (1961). Cretaceous planktonic foraminifera: Part I-Cenomanian. Micropaleontology. 7: 257-304. gs Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs OReferences:

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Whiteinella brittonensis compiled by the pforams@mikrotax project team viewed: 10-5-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=110577 Go to Archive.is to create a permanent copy of this page - citation notes |
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