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Muricohedbergella crassa


Classification: pf_mesozoic -> Hedbergellidae -> Muricohedbergella -> Muricohedbergella crassa
Sister taxa: M. almadenensis, M. angolae, M. astrepta, M. atlantica, M. blakensis, M. crassa, M. delrioensis, M. flandrini, M. hoelzli, M. holmdelensis, M. implicata, M. kyphoma, M. loetterli, M. monmouthensis, M. planispira, M. portsdownensis, M. praelibyca, M. rosebudensis, M. sliteri, M. wondersi, M. sp.,

Taxonomy

Citation: Muricohedbergella crassa (Bolli, 1959)
Rank: Species
Basionym: Praeglobotruncana crassa

Type images:

Original description: Shape of test low trochospiral, equatorial periphery lobate. Wall calcareous, finely perforate. Chambers spherical in early stage, becoming slightly compressed laterally in the final whorl, giving the test a thick appearance. Approximately 15 chambers arranged in about 3 whorls. The 5 chambers of the last whorl increase moderately in size. Sutures radial, depressed on spiral and umbilical side. Umbilicus narrow, deep. Aperture a low arch, interiomarginal, umbilical-extraumbilical. Coiling random.

Entries in the Catalog of original descriptions: Praeglobotruncana crassa

Geological Range:
Last occurrence (top): within D. concavata zone (86.71-89.91Ma, top in Coniacian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.56-93.52Ma, base in Turonian 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: Muricohedbergella crassa, synonyms included - Hedbergella crassa; Praeglobotruncana crassa;
  • space-time plot :: Samples map :: Parent: Muricohedbergella

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Inflatedcoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
    spiral sutures:Moderately depressedumb depth:Shallowwall texture:Smoothshell porosity:
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Bolli, H. M. (1959c). Planktonic foraminifera from the Cretaceous of Trinidad, B. W. I. Bulletins of American Paleontology. 39(179): 253-277. gs


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    Muricohedbergella crassa compiled by the pforams@mikrotax project team viewed: 28-2-2020

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110363 Go to Archive.is to create a permanent copy of this page - citation notes



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