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Archaeoglobigerina blowi


Classification: pf_mesozoic -> Rugoglobigerinidae -> Archaeoglobigerina -> Archaeoglobigerina blowi
Sister taxa: A. australis, A. blowi, A. bosquensis, A. cretacea, A. mateola, A. sp.,

Taxonomy

Citation: Archaeoglobigerina blowi Pessagno 1967
Rank: Species
Basionym: Archaeoglobigerina blowi
Synonyms: Globotruncana pura

Type images:

Original description: Test trochoid: lobulate peripherally. Chambers spherical. nearly as elongate as wide: about four or five in last whorl, rapidly increasing in size. Coiling predominantly dextral; sutures depressed, radial. straight to slightly curved spirally and umbilically. Umbilicus medium-sized and deep covered by tegilla with intralaminal and infralaminal accessory apertures in well-preserved specimens. Periphery occasionally with weakly developed double keel which occurs chiefly on the first one or two chambers of the final whorl. but usually keel-less with or without an imperforate peripheral band: nontruncate. Test surface either smooth throughout or somewhat rugose on the earlier chambers; last two or three chambers usually smooth irregardless of previous ornamentation. Primary aperture interiomarginal, umbilical in position. Outer wall except for rugosities, keels, and imperforate peripheraI band. raclial hyaline, perforate: rugosities ultragranular hyaline. imperforate; keels radial hyaline and ultragrnnular hyaline. imperforate; peripheral band radial hyaline imperforate.

Entries in the Catalog of original descriptions: Archaeoglobigerina blowi, Globotruncana pura

Geological Range:
Last occurrence (top): within A. mayaroensis zone (67.30-69.18Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within A. mayaroensis zone (67.30-69.18Ma, base in Maastrichtian 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: Archaeoglobigerina blowi, synonyms included - Archaeoglobigerina blowi; Archaeoglobigerina pura; Globotruncana para;
  • space-time plot :: Samples map :: Parent: Archaeoglobigerina

    Character matrix

    test outline:Quadratechamber arrangement:Trochospiraledge view:aperture:Umbilical-extraumbilical
    sp chamber shape:Inflatedcoiling axis:Low-moderateperiphery:Imperforate bandaperture border:Thick porticus
    umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:None
    spiral sutures:Moderately depressedumb depth:Shallowwall texture:Moderately muricateshell porosity:
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.5-5.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs

    Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(03-Apr): 145-305. gs


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    Archaeoglobigerina blowi compiled by the pforams@mikrotax project team viewed: 24-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110012 Go to Archive.is to create a permanent copy of this page - citation notes



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