Globorotalia lobata

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globorotalidae -> Globorotalia -> fohsi lineage -> Globorotalia lobata
Sister taxa: G. fohsi, G. lenguaensis, G. lobata, G. paralenguaensis, G. peripheroacuta, G. peripheroronda, G. praefohsi, G. robusta,

Taxonomy

Citation: Globorotalia lobata Bermudez 1949
Rank: species
Basionym: Globorotalia lobata
Synonyms:

Catalog entries: Globorotalia lobata;

Type images:

Description


Diagnostic characters: Biconvex, low trochospiral, last few chambers distinctly lobulate with keel

Aperture: : Interiomarginal umbilical-extraumbilical slit with small flange-like lip [Aze 2011, based on Kennett & Srinivasan 1983]


Wall type: Non-spinose; Smooth [Aze 2011]

Test morphology: Test low trochospiral, biconvex, equatorial periphery of the last few chambers distinctly lobulate; six to eight chambers of the final whorl, increasing rapidly in size, especially in their radial length, giving rise to a characteristic cockscomb outline; sutures on spiral side recurved, limbate coalescing into the peripheral keel, on umbilical side slightly curved to radial ; surface smooth, distinctly and uniformly perforate; umbilicus narrow; aperture interio-marginal, extraumbilical-umbilical, a slit with a small flangelike lip. [Kennett & Srinivasan 1983]

Biogeography and Palaeobiology


Geographic distribution: Restricted to equatorial areas. [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): Keller (1985); Hodell & Vayavananda (1993); Pearson & Shackleton (1995)

Phylogenetic relations: This species is distinguished from Gr. (F.) fohsi fohsi by its larger test size and typical cockscomb-shaped peripheral margin, a change that marks the base of Globorotalia fohsi lobata Zone of Bolli (1957).
Blow and Banner (1966) and Blow (1969) suggested that Gr. (F.) fohsi lobata and Gr. (F.) fohsi robusta may be phenotypic variants of a single form, but we consider them to be valid phylogenetic species. [Kennett & Srinivasan 1983]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within M9b subzone (11.79-13.13Ma, top in Serravallian stage). Data source: Kennett & Srinivasan 1983
First occurrence (base): within M9a subzone (13.13-13.41Ma, base in Serravallian stage). Data source: Wade et al. (2011), additional event; position within zone not given in table 1 of Wade et al. (2011).

Plot of occurrence data:

Primary source for this page: Kennett & Srinivisan 1983, p.100

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.

Bermudez, P.J., (1949). Tertiary smaller foraminifera of the Dominican Republic. Contributions from the Cushman Laboratory for Foraminiferal Research special publication, 25: 1-322.

Blow, W.H. & Banner, F.T., (1966). The morphology, taxonomy and biostratigraphy of Globorotalia barisanensis LeRoy, Globorotalia fohsi Cushman and Ellisor, and related taxa. Micropaleontology, 12(3): 286-302.

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.

Hodell, D.A. & Vayavananda, A., (1993). Middle Miocene paleoceanography of the western equatorial Pacific (DSDP Site 289) and the evolution of Globorotalia (Fohsella). Marine Micropaleontology, 22: 279-310.

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.

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.

Wade, B.S.; Pearson, P.N.; Berggren, W.A. & Pälike, H., (2011). Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews, 104: 111-142.


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Globorotalia lobata compiled by the pforams@mikrotax project team viewed: 24-9-2017

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AphiaID: 909535 Nomenclatural data on WoRMS
Go to Archive.is to create a permanent copy of this page - citation notes



AphiaID: 909535 Nomenclatural data on WoRMS
Go to Archive.is to create a permanent copy of this page - citation notes

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