pforams@mikrotax - Whiteinella brittonensis

Whiteinella brittonensis


Classification: pf_mesozoic -> Hedbergellidae -> Whiteinella -> Whiteinella brittonensis
Sister taxa: W. aprica, W. archaeocretacea, W. aumalensis, W. baltica, W. bornholmensis, W. brittonensis, W. inornata, W. paradubia, W. sp.

Taxonomy

Citation: Whiteinella brittonensis (Loeblich and Tappan, 1961)
Rank: Species
Basionym: Hedbergella brittonensis

Type images:

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


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Circularchamber arrangement:Trochospiraledge view:Spiroconvexaperture:Umbilical-extraumbilical
sp chamber shape:Globularcoiling axis:Moderate-highperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Deepwall texture:Moderately muricateshell porosity:
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within H. helvetica zone (92.56-93.52Ma, 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:

References:

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 V O


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Whiteinella brittonensis compiled by the pforams@mikrotax project team viewed: 30-11-2022

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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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