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Planoglobulina browni


Classification: pf_mesozoic -> Heterohelicidae -> Planoglobulina -> Planoglobulina browni
Sister taxa: P. acervulinoides, P. brazoensis, P. browni, P. carseyae, P. manuelensis, P. multicamerata, P. riograndensis, P. sp.,

Taxonomy

Citation: Planoglobulina browni (Martin, 1972)
Rank: Species
Basionym: Ventilabrella browni
Taxonomic discussion: Ventilabrella browni MARTIN (1972, p.85, pl.1, figs.1-2) is a junior synonym of Ventilabrella eggeri CUSHMAN 1928. [copied from Chronos database]

Type images:

Original description: "Test flabelliform, laterally compressed, with 6-8 subglobular chambers in biserial portion; up to 10 subglobular to pyriform chambers in multiserial portion. Longitudinal costae very heavy on biserial portion; costae finer and discontinuous on multiserial portion. Sutures indistinct, depressed. Arched, basal apertures on front and back of all but outermost chambers in final row; outermost chambers with apertures on front only, facing inward."

Entries in the Catalog of original descriptions: Ventilabrella browni

Geological Range:
Last occurrence (top): within G. ventricosa zone (76.18-79.20Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. elevata zone (79.20-84.19Ma, base in Santonian 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: Planoglobulina

    Character matrix

    test outline:Palmatechamber arrangement:Multiserialedge view:Compressedaperture:Multiple
    sp chamber shape:Elongatecoiling axis:N/Aperiphery:N/Aaperture border:N/A
    umb chbr shape:Elongateumbilicus:N/Aperiph margin shape:N/Aaccessory apertures:None
    spiral sutures:Weakly depressedumb depth:N/Awall texture:Meridional costellaeshell porosity:Microperforate: <1┬Ám
    umbilical or test sutures:Weakly depressedfinal-whorl chambers:6.0-10.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Martin, S. E. (1972). Reexamination of the Upper Cretaceous planktonic foraminifera genera Planoglobulina and Ventilabrella Cushman. Journal of Foraminiferal Research. 2(2): 73-92. gs


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    Planoglobulina browni compiled by the pforams@mikrotax project team viewed: 25-8-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110393 Go to Archive.is to create a permanent copy of this page - citation notes



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