Globorotalia pseudomiocenica


Classification: pf_cenozoic -> Globorotaliidae -> Globorotalia -> menardii lineage -> Globorotalia pseudomiocenica
Sister taxa: G. pertenuis, G. exilis, G. multicamerata, G. miocenica, G. pseudomiocenica, G. limbata, G. menardii, G. praemenardii, G. archeomenardii,

Taxonomy

Citation: Globorotalia pseudomiocenica Bolli & Bermudez 1965
Rank: species
Basionym: Globorotalia pseudomiocenica
Taxonomic discussion: Has been considerd a synonym of Globorotalia limbata (Fornasini 1902)

Catalog entries: Globorotalia pseudomiocenica

Type images:

Distinguishing features: strongly-biconvex test with a sub-circular equatorial periphery and pronounced keel.

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Diagnostic characters: Lenticular, low trochospiral, prominent keel and densely perforate surface

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


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

Character matrix

test outline:Subcircularchamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Crescenticcoiling axis:Lowperiphery:Single keelaperture border:Thin lip
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Subangularaccessory apertures:None
spiral sutures:Raisedumb depth:Shallowwall texture:Smoothshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Weakly depressedfinal-whorl chambers:4.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Low latitudes [Aze et al. 2011, based on Kennett & Srinivasan (1983)]

[SCOR WG138]


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 Sources cited by Aze et al. 2011 (appendix S3): D. R. M. Stewart unpublished data

Most likely ancestor: Globorotalia limbata - at confidence level 3 (out of 5). Data source: Stewart 2003 fig. 6.10; Aze et al. 2011, appendix 5.
Likely descendants: Globorotalia miocenica;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of PL5 [Pac.] zone (100% up, 2.3Ma, in Gelasian stage). Data source: Wade et al. (2011), zonal marker
First occurrence (base): within M13b subzone (6.14-8.58Ma, base in Tortonian stage). Data source: Aze et al. 2011

Plot of occurrence data:

References:

Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs

Bolli, H. M. & Bermudez, P. J. (1965). Zonation based on planktonic foraminifera of middle Miocene to Pliocene warm-water sediments. Bol. Informativo, Asoc. Venez. Geol., Min. Petrol.. 8(5): 121-149. gs

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

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs

Stewart, D. R. M. I. (2003). Evolution of Neogene globorotaliid foraminifera and Micoene climate change. In, p269 (ed.) . Earth Sciences. 1-269. gs


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Globorotalia pseudomiocenica compiled by the pforams@mikrotax project team viewed: 19-11-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104128 Go to Archive.is to create a permanent copy of this page - citation notes



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