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Whiteinella baltica


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

Taxonomy

Citation: Whiteinella baltica Douglas and Rankin 1969
Rank: Species
Basionym: Whiteinella baltica
Synonyms: Rugoglobigerina? alpina

Type images:

Original description: "Test free, low trochospiral, equatorial periphery strongly lobulate, axial periphery rounded. Chambers inflated, subspherical four to five in final whorl; initial chambers increase rapidly in size, final chambers increase gradually. Sprial and umbilical sutures radial to slightly curved, depressed, distinct. Chamber surface coarsely hispid. Wall calcareous, perforate. Umbilicus shallow, wide. Primary aperture extraumbilical-umbilical covered by large flap in well preserved specimens. "Whiteinella archaeocretacea Pessagno may be distinguished from the new species by (1) the larger umbilical cavity and (2) by sausagelike chambers which are compressed in the equatorial plane. Also, the Texas form attains a larger size; specimens range up to 0.70 mm in diameter."R

Entries in the Catalog of original descriptions: Whiteinella baltica, Rugoglobigerina alpina

Geological Range:
Last occurrence (top): within G. elevata zone (79.20-84.19Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. cushmani zone (94.03-95.94Ma, 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 baltica, synonyms included - Whiteinella alpina; Whiteinella baltica;
  • space-time plot :: Samples map :: Parent: Whiteinella

    Character matrix

    test outline:Quadratechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thick flange
    umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Moderately muricateshell porosity:
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.0-4.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Douglas, R. G. & Rankin, C. (1969). Cretaceous planktonic foraminifera from Bornholm and their zoogeographic significance. Lethaia. 2: 185-217. gs

    Leckie, M. (1985). Foraminifera of the Cenomanian-Turonian boundary interval, Greenhorn Formation, Rock Canyon Antoicline, Pueblo, Colorado. In, Pratt, L. M. , Kauffman, E. G. & Zelt, F. B. (eds) Fine-grained deposits and biofacies of the Cretaeous Wesern Interior Seaway: Evidence of cyclic sedimentary processes. SEPM Field Trip Guidebook. 4: 139-149. gs


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    Whiteinella baltica compiled by the pforams@mikrotax project team viewed: 17-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110575 Go to Archive.is to create a permanent copy of this page - citation notes



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