pforams@mikrotax - Globotruncana sp. pforams@mikrotax - Globotruncana sp.

Globotruncana sp.


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncana -> Globotruncana sp.
Sister taxa: G. aegyptiaca, G. arca, G. bulloides, G. dalbiezi, G. dupeublei, G. esnehensis, G. falsostuarti, G. hilli, G. lapparenti, G. linneiana, G. mariei, G. neotricarinata, G. orientalis, G. rosetta, G. rugosa, G. ventricosa, G. sp.

Taxonomy

Taxonomic rank: generic level id

Entries in the Catalog of original descriptions:

Distinguishing features:
Parent taxon (Globotruncana): Test high to low trochospiral, umbilicus occupying from one-fourth to one-half the diameter of the flat to concave umbilical side, peripheral margin truncate and bicarinate, keels separated by an imperforate carinal band, keel on the umbilical side less well developed and may be absent from the final few chambers, peripheral outline entire to lobulate; wall calcareous, finely perforate, surface generally smooth on the spiral side, may be pustulose on the umbilical side, particularly on the earlier chambers, sutures curved to straight, elevated on the spiral side and depressed, flush, or elevated on the umbilical side; primary aperture interiomarginal and umbilical, may be bordered by portici in the early stage, later or always with a system of tegilla that cover most of the umbilicus and have both proximal and distal accessory apertures.
This taxon: Specimens which cannot be assigned to established species

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage).
First occurrence (base): within (-Ma, base in "Holocene" stage).

Plot of range and occurrence data:

References:

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs O


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Globotruncana sp. compiled by the pforams@mikrotax project team viewed: 16-2-2025

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110173 Go to Archive.is to create a permanent copy of this page - citation notes



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