Neogloboquadrina atlantica


Classification: pf_cenozoic -> Globorotaliidae -> Neogloboquadrina -> Neogloboquadrina atlantica
Sister taxa: N. pachyderma, N. incompta, N. inglei, N. dutertrei, N. humerosa, N. acostaensis, N. atlantica, N. sp.,

Taxonomy

Citation: Neogloboquadrina atlantica (Berggren 1972)
Rank: Species
Basionym: Globigerina atlantica Berggren 1972
Taxonomic discussion: Not recognised by Aze et al. (2011) but included here since it is a widely reported taxon and since it is used as a marker by Wade et al. (2011).
Kennett & Srinivasan (1983) do not document the species in detail but note that Neogloboquadrina "also includes N. atlantica (Berggren), a form which seems to be restricted to the North Atlantic in the Late Neogene but for which phylogentic relationships are still unclear."

Catalog entries: Globigerina atlantica

Type images:

Distinguishing features: Like N. dutertrei but tighter coiling (& so narrower umbilicus) and granular wall.

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

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Weakly depressedumb depth:Deepwall texture:Cancellateshell porosity:Macroperforate: >2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Most likely ancestor: Neogloboquadrina acostaensis - at confidence level 1 (out of 5). Data source: Berggren 1972 records the species as being part of the numerosa-dutetrei group so if its FAD is in N16 the ancestor is perhaps most likely to be N. acostaensis [editors comment - JRY 2018].

Biostratigraphic distribution

Geological Range:
Notes: Biostratigraphic use of the taxon is discussed in Berggren 1972 and Weaver 1987. Coiling reversal from dextral to sinistral was listed by Wade et al. (2011) as a subsidiary event within M14
Last occurrence (top): within N21 zone (1.93-3.10Ma, top in Gelasian stage). Data source: Berggren 1972
First occurrence (base): within N16 zone (8.58-9.83Ma, base in Tortonian stage). Data source: Berggren 1972

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

Berggren, W. A. (1972). Cenozoic biostratigraphy and paleobiogeography of the North Atlantic. Initial Reports of the Deep Sea Drilling Project. 12: 965-1001. gs

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

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. gs


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Neogloboquadrina atlantica compiled by the pforams@mikrotax project team viewed: 8-12-2019

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104384 Go to Archive.is to create a permanent copy of this page - citation notes



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