nmn

Falsotruncana douglasi


Classification: pf_mesozoic -> Hedbergellidae -> Falsotruncana -> Falsotruncana douglasi
Sister taxa: F. douglasi, F. loeblichae, F. maslakovae, F. sp.,

Taxonomy

Citation: Falsotruncana douglasi Caron 1981
Rank: Species
Basionym: Falsotruncana douglasi

Type images:

Original description: Translated from French: Diagnosis: Transitional form, still closely related to Hedbergella hoelzli Hagn et Zeil, its ancestor. Chambers of the spiral side very pustulose and inflated. Two rows of thick pustules present on the edges of a narrow poreless carinal band, except for the two last chambers. All the other characteristics are as in the genus.

Entries in the Catalog of original descriptions: Falsotruncana douglasi

Geological Range:
Last occurrence (top): within M. schneegansi zone (89.91-92.56Ma, top in Turonian 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: Falsotruncana douglasi, synonyms included - Falsotruncana douglasi; space-time plot :: Samples map :: Parent: Falsotruncana

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Petaloidcoiling axis:Lowperiphery:Double keelaperture border:Thin lip
    umb chbr shape:Trapezoidalumbilicus:Wideperiph margin shape:Subangularaccessory apertures:Relict
    spiral sutures:Moderately depressedumb depth:Shallowwall texture:Coarsely pustuloseshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:6.0-6.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Caron, M. (1981). Un nouveau genre de Foraminifere planctonique du Cretace: Falsotruncana nov. gen. Eclogae Geologicae Helvetiae. 74(1): 65-73. gs


    logo

    Falsotruncana douglasi compiled by the pforams@mikrotax project team viewed: 18-8-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/pforams/index.php?id=110102 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