nmn

Microhedbergella pseudotrocoidea


Classification: pf_mesozoic -> Hedbergellidae -> Microhedbergella -> Microhedbergella pseudotrocoidea
Sister taxa: M. albiana, M. intermedia, M. miniglobularis, M. praeplanispira, M. pseudodelrioensis, M. pseudoplanispira, M. pseudotrocoidea, M. renilaevis, M. rischi, M. sp.,

Taxonomy

Citation: Microhedbergella pseudotrocoidea (Michael 1973)
Rank: Species
Basionym: Hedbergella pseudotrocoidea

Type images:

Original description: Test small to medium, a low trochospiral of about 2.5 volutions; last whorl with 7-8 subglobular chambers increasing gradually in size; last chamber exceptionally large and protruding into a relatively wide umbilicus; periphery broadly rounded, lobulate; sutures radial, straight and depressed; primary aperture interiomarginal, extraumbilical-umbilical; a fragile narrow lip rarely preserved.

Entries in the Catalog of original descriptions: Hedbergella pseudotrocoidea

Geological Range:
Last occurrence (top): within P. appenninica zone (100.50-101.92Ma, top in Albian stage). Data source: [copied from Chronos database]
First occurrence (base): within P. appenninica zone (100.50-101.92Ma, base in Albian 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: Microhedbergella

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:-aperture:-
    sp chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:Relict
    spiral sutures:Moderately depressedumb depth:Deepwall texture:Smoothshell porosity:-
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:7.0-8.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Michael, F. Y. (1973). Planktonic foraminifera from the Comanchean Series (Cretaceous) of Texas. Journal of Foraminiferal Research. 2 (1972)(4): 200-220. gs


    logo

    Microhedbergella pseudotrocoidea compiled by the pforams@mikrotax project team viewed: 11-12-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/pforams/index.php?id=110353 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (1)

    Sort By
    Page 1 of 1
     
    Gravatar
    Le Coze

    Citation: Microhedbergella pseudotrocoidea Michael 1973 brackets missing

    Gravatar
    Jeremy Young (UK)

    corrected now, thanks

    Page 1 of 1
     

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics