Globigerinoides seigliei

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Globigerinoides -> Globigerinoides seigliei
Sister taxa: G. altiaperturus, G. conglobatus, G. diminutus, G. elongatus, G. extremus, G. mitra, G. obliquus, G. parawoodi, G. ruber, G. seigliei, G. subquadratus, G. tenellus, G. white, G. sp.,

Taxonomy

Citation: Globigerinoides seigliei Bermudez & Bolli 1969
Rank: species
Basionym: Globigerinoides rubra seigliei
Synonyms:

Globigerinoides tyrrhenicus Borsetti and Cati [according to Berggren 1977; Kennett & Srinivasan 1983]

Catalog entries: Globigerinoides rubra seigliei;
Globigerinoides tyrrhenicus;

Type images:

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Diagnostic characters: Large, medium to high trochospiral, subquadrate outline

Aperture: Primary aperture interiomarginal umbilical wide arch with rim. Supplementary sutural apertures on spiral side [Aze 2011, based on Kennett & Srinivasan 1983]


Wall type: Spinose; Cancellate [Aze 2011]

Test morphology: Test large subquadrate, medium to high trochospiral, three subspherical to ovate chambers in the final whorl; sutures radial, depressed; surface coarsely perforate; primary aperture interiomarginal, umbilical, a wide-open asymmetrical arch; supplementary apertures large, high arch situated over sutures of earlier chambers. [Kennett & Srinivasan 1983]

Biogeography and Palaeobiology


Geographic distribution: Warm to cool subtropical. [Kennett & Srinivasan 1983]

Isotope paleobiology: Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts. Based on very heavy ∂13C and relatively light ∂18O. Sources cited by Aze et al. 2011 (appendix S3): Keller (1985)

Phylogenetic relations: The morphology of Gs. siegliei closely resembles Gs. ruber from which it seems to have been derived during the Late Miocene by developing somewhat aberrant primary and supplementary apertures. [Kennett & Srinivasan 1983]

Most likely ancestor: Globigerinoides ruber - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 10.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N18 zone (5.20-5.72Ma, top in Zanclean stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N16 zone (8.58-9.83Ma, base in Tortonian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.78

References:

Aze, T.; Ezard, T.H.G.; Purvis, A.; Coxall, H.K.; Stewart, D.R.M.; Wade, B.S. & Pearson, P.N.P., (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews, 86: 900-927.

Berggren, W.A., (1977). Late Neogene foraminiferal biostratigraphy of the Rio Grande Rise (South Atlantic). Marine Micropaleontology, 2(3): 265-313.

Bermudez, P.J. & Bolli, H.M., (1969). Consideraciones sobre los sedimentos del mioceno medio al reciente de las costas central y oriental de Venezuela. Tercera Parte. Los foraminiferos planctonicos. Boletin de Geologia, 10(20): 137-223.

Keller, G., (1985). Depth stratification of planktonic foraminifers in the Miocene Ocean. In: Kennett, J.P. (Editor), The Miocene Ocean: Paleoceanography and Biogeography. GSA Memoir The Geological Society of America, Boulder, Colorado, pp. 1-337.

Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp.


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Globigerinoides seigliei compiled by the pforams@mikrotax project team viewed: 19-11-2017

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