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, Globoquadrina asanoi
Type images:Distinguishing features:
Parent taxon (Neogloboquadrina): Cancellate wall; umbilical-extraumbilical aperture:
This taxon: Like N. dutertrei but tighter coiling (& so narrower umbilicus) and granular wall.
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Globular | coiling axis: | Low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Globular | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Weakly depressed | umb depth: | Deep | wall texture: | Cancellate | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4-5 | N.B. These characters are used for advanced search. N/A - not applicable |
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].
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:
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 Lam, A. & Leckie, R. M. (2020a). Late Neogene and Quaternary diversity and taxonomy of subtropical to temperate planktic foraminifera across the Kuroshio Current Extension, northwest Pacific Ocean. Micropaleontology. 66(3): 177-268. 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. gsReferences:
Neogloboquadrina atlantica compiled by the pforams@mikrotax project team viewed: 10-11-2024
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