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Planoglobulina riograndensis


Classification: pf_mesozoic -> Heterohelicidae -> Planoglobulina -> Planoglobulina riograndensis
Sister taxa: P. acervulinoides, P. brazoensis, P. browni, P. carseyae, P. manuelensis, P. multicamerata, P. riograndensis, P. sp.,

Taxonomy

Citation: Planoglobulina riograndensis (Martin, 1972)
Rank: Species
Basionym: Ventilabrella riograndensis

Type images:

Original description: Biserial chambers rapidly expanding in size; followed by up to 5 multiserial sets; surface covered with fine vermicular ornamentation; last set of chamberlets usually covered with fine, discontinuous costae.

Entries in the Catalog of original descriptions: Ventilabrella riograndensis

Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. calcarata zone (75.71-76.18Ma, base in Campanian 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: Planoglobulina riograndensis, synonyms included - Planoglobulina riograndensis;
  • space-time plot :: Samples map :: Parent: Planoglobulina

    Character matrix

    test outline:Palmatechamber arrangement:Multiserialedge view:Compressedaperture:Multiple
    sp chamber shape:Inflatedcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
    umb chbr shape:Inflatedumbilicus:N/Aperiph margin shape:Moderately roundedaccessory apertures:N/A
    spiral sutures:Moderately depressedumb depth:N/Awall texture:Finely costateshell porosity:
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-8.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Martin, S. E. (1972). Reexamination of the Upper Cretaceous planktonic foraminifera genera Planoglobulina and Ventilabrella Cushman. Journal of Foraminiferal Research. 2(2): 73-92. gs


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    Planoglobulina riograndensis compiled by the pforams@mikrotax project team viewed: 9-12-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110397 Go to Archive.is to create a permanent copy of this page - citation notes



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