nmn

Muricohedbergella atlantica


Classification: pf_mesozoic -> Hedbergellidae -> Muricohedbergella -> Muricohedbergella atlantica
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 atlantica (Petters, 1977)
Rank: Species
Basionym: Hedbergella atlantica
Synonyms: Hedbergella lata

Type images:

Original description: "Test very low trochospiral, nearly planispiral in appearance, slightly depressed spirally, outline ovate, equatorial periphery strongly lobulate. Wall strongly hispid and finely perforate. Chambers 5 to 6 1/2 in the final whorl, increasing gradually in size, inflated, spherical to subspherical; about two whorls. Sutures almost radial, depressed both spirally and umbilically. Umbilicus wide and shallow. Primary aperture a low arch, interiomarginal, umbilical-extraumbilical, extending halfway onto the equatorial periphery, with a broad lip extending into the umbilicus if well preserved. Greatest diameter is about 0.22 mm."

Entries in the Catalog of original descriptions: Hedbergella atlantica, Hedbergella lata

Geological Range:
Last occurrence (top): within R. calcarata zone (75.71-76.18Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. asymetrica zone (84.19-86.71Ma, base in Coniacian 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

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Muricohedbergella

    Character matrix

    test outline:Lobatechamber arrangement:Planispiraledge view:Compressedaperture: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:Strongly depressedumb depth:Deepwall texture:Mod. Pustuloseshell porosity:Finely Perforate: 1-2.5┬Ám
    umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.0-6.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Petters, S. W. (1977). Upper Cretaceous planktonic foraminifera from the subsurface of the Atlantic Coastal Plain of New Jersey. Journal of Foraminiferal Research. 7(3): 165-188. gs


    logo

    Muricohedbergella atlantica compiled by the pforams@mikrotax project team viewed: 8-12-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/pforams/index.php?id=110361 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics