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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 range and occurrence data:

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: 13-4-2021

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Short stable page link: https://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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