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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

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 occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Whiteinella inornata, synonyms included - Globotruncana inornata; Marginotruncana inornata; Whiteinella inornata;
  • space-time plot :: Samples map :: Parent: Whiteinella

    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

    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

    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


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    Whiteinella inornata compiled by the pforams@mikrotax project team viewed: 8-12-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110578 Go to Archive.is to create a permanent copy of this page - citation notes



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