pforams@mikrotax - Whiteinella inornata

Whiteinella inornata


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

Taxonomy

Citation: Whiteinella inornata (Bolli, 1957)
Rank: Species
Basionym: Globotruncana inornata

Type images:

Original description: Shape of test low trochospiral, biconvex; the equatorial periphery strongly lobate, early chambers of last whorl rounded at periphery, last and occasionally penultimate chambers compressed with sharp peripheral edge or faint keel. Wall calcareous, perforate surface of early chambers in well-preserved specimens showing some rugosity. Chambers subangular, compressed; fourteen to sixteen, arranged in three whorls; the four chambers of the last whorl increase rapidly in size, early whorls small by comparison. Sutures of spiral side slightly curved, depressed, of umbilcal side straight, depressed. Umbilical shallow, wide. Primary apertures interiomarginal, umbilical; tegilla with accessory apertures poorly preserved in examined specimens. The coiling predominantly dextral; of fifty specimens counted, only four coiled sinistrally. 

Entries in the Catalog of original descriptions: Globotruncana inornata


Emended description:


Morphology:

Wall type:

Size:

Character matrix
test outline:Circularchamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Inflatedcoiling axis:Lowperiphery:aperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Mod. Pustuloseshell porosity:
umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-4.5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within D. asymetrica zone (84.19-86.71Ma, top in Santonian 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:

Bolli, H. M. (1957e). The genera Praeglobotruncana, Rotalipora, Globotruncana, and Abathomphalus in the Upper Cretaceous of Trinidad, B. W. I. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin . 215: 51-60. gs V O

Eicher, D. L. & Worstell, P. (1970). Lunatriella, a Cretaceous heterohelicid foraminifer from the western interior of the United States. Micropaleontology. 16(1): 117-121. gs

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

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

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