Globigerinella praesiphonifera

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Globigerinella -> Globigerinella praesiphonifera
Sister taxa: G. adamsi, G. calida, G. praesiphonifera, G. pseudobesa, G. radians, G. siphonifera, G. sp.,

Taxonomy

Citation: Globigerinella praesiphonifera (Blow, 1969)
Rank: species
Basionym: Hastigerina (Hastigerina) siphonifera praesiphonifera Blow, 1969

Catalog entries: Hastigerina (Hastigerina) siphonifera praesiphonifera;

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: Initially trochospiral becoming planispiral in final whorl

Aperture: : Interiomarginal umbilical-extraumbilical opening [Aze 2011, based on Kennett & Srinivasan 1983]


Wall type: Spinose; Hispid [Aze 2011]

Test morphology: Test low trochospiral, equatorial periphery lobulate; axial periphery broadly rounded; chambers inflated, subglobular, well separated from one another, 5 slowly enlarging chambers in the final whorl; sutures strongly curved, depressed; surface finely hispid, spinose with circular spine bases; umbilicus narrow, deep; aperture interiomarginal, umbilical-extraumbilical, without a lip or rim. [Kennett & Srinivasan 1983]

Biogeography and Palaeobiology


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

Isotope paleobiology: Aze et al. 2011 ecogroup 3 - Open ocean thermocline. Based on light ∂13C and relatively heavy ∂18O. Sources cited by Aze et al. 2011 (appendix S3): Pearson et al. (2001b); Pearson & Shackleton (1995)

Phylogenetic relations: Ge. praesiphonifera differs from Ge. aequilateralis in that the trochospiral coil is maintained throughout and that the tendency toward planispirality is confined to the final whorl. This species is distinguished from Ge. obesa by an additional chamber in the final whorl and more lobulate periphery.
Ge. praesiphonifera develops from Ge. obesa in the earliest Miocene and is ancestral to Ge. aequilateralis. [Kennett & Srinivasan 1983]

Most likely ancestor: Globigerinoides diminutus - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig. 26.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within N13 zone (11.63-11.79Ma, top in Serravallian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within N4b zone (22.20-23.50Ma, base in Chattian stage). Data source: Kennett & Srinivasan 1983

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.238

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.

Blow, W.H., (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In: Bronnimann, P. and Renz, H.H. (Editors), Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967, Leiden, Netherlands, pp. 380-381.

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

Pearson, P.N. & Shackleton, N.J., (1995). Neogene multispecies planktonic foraminifer stable isotope record, Site 871, Limalok Guyot. Proceedings of the Ocean Drilling Program, Scientific Results, 144. Ocean Drilling Program, College Station, TX, 401-410 pp.

Pearson, P.N. & others, (2001). Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs. Nature, 413: 481-487.

Pearson, P.N.; Norris, R.D. & Empson, A., (2001). Mutabella mirabilis gen. et sp. nov., a Miocene microperforate planktonic foraminifer with an extreme level of intraspecific variability. Journal of Foraminiferal Research, 31: 120-132.


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Globigerinella praesiphonifera compiled by the pforams@mikrotax project team viewed: 13-12-2017

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