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Loeblichella convexa


Classification: pf_mesozoic -> Globotruncanidae -> Loeblichella -> Loeblichella convexa
Sister taxa: L. coarctata, L. convexa, L. hessi, L. sp.,

Taxonomy

Citation: Loeblichella convexa Longoria 1974
Rank: Species
Basionym: Loeblichella convexa
Synonyms: Loeblichella pessagnoi

Type images:

Original description: Test as with genus; small, planoconvex, spiral side flattened except for convex projections of individual chambers, umbilical side convex; formed by about three whorls; peripheral outline circular, lobate; five to six chambers in the last whorl, increasing gradually in size as added; chambers subtrapezoidal on spiral side; subtriangular on umbilical side; spherical to planoconvex in peripheral view; sutures straight, depressed on both spiral and umbilical sides; primary aperture extraumbilical-spiroumbilical, umbilicus narrow.

Entries in the Catalog of original descriptions: Loeblichella convexa, Loeblichella pessagnoi

Geological Range:
Last occurrence (top): within L. cabri zone (123.89-125.71Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within L. cabri zone (123.89-125.71Ma, base in Aptian 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: Loeblichella

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Compressedaperture:Extraumbilical-peripheral
    sp chamber shape:Globularcoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
    umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Moderately roundedaccessory apertures:N/A
    spiral sutures:Moderately depressedumb depth:Deepwall texture:Smoothshell porosity:Microperforate: <1µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Longoria, J. F. (1974). Stratigraphic, morphologic and taxonomic studies of Aptian planktonic foraminifera. Revista Española de Micropaleontología. Numero Extraordinario: 5-107. gs


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    Loeblichella convexa compiled by the pforams@mikrotax project team viewed: 22-10-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110322 Go to Archive.is to create a permanent copy of this page - citation notes



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