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Guembelitria cretacea


Classification: pf_mesozoic -> Guembelitriidae -> Guembelitria -> Guembelitria cretacea
Sister taxa: G. cenomana, G. cretacea, G. sergipensis, G. sp.,

Taxonomy

Citation: Guembelitria cretacea Cushman 1933
Rank: Species
Basionym: Guembelitria cretacea

Type images:

Original description: Test small, triserial; chambers globular, nearly spherical; sutures much depressed; wall smooth, finely perforate; aperture large, semicircular or semi-elliptical at the inner margin of the last-formed chamber. 

Entries in the Catalog of original descriptions: Guembelitria cretacea

Geological Range:
Last occurrence (top): in mid part of P1b subzone (50% up, 64.6Ma, in Danian stage). Data source: Olsson et al., 1999
First occurrence (base): within G. elevata zone (79.20-84.19Ma, base in Santonian stage). Data source:

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: Guembelitria cretacea, synonyms included - Chiloguembelina danica; Guembelitria cretacea; Guembelitria trifolia; space-time plot :: Samples map :: Parent: Guembelitria

    Character matrix

    test outline:Triangularchamber arrangement:Triserialedge view:Spiroconvexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Highperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
    spiral sutures:Strongly depressedumb depth:Shallowwall texture:Pore moundsshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.0-3.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:


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    Guembelitria cretacea compiled by the pforams@mikrotax project team viewed: 18-8-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110220 Go to Archive.is to create a permanent copy of this page - citation notes



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