Neogloboquadrina acostaensis


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

Taxonomy

Citation: Neogloboquadrina acostaensis (Blow, 1959)
Rank: species
Basionym: Globorotalia acostaensis Blow, 1959
Synonyms:

Catalog entries: Globorotalia acostaensis, Globorotalia (Turborotalia) acostaensis tegillata,

Type images:

Distinguishing features: Like N. continuosa but 5-5½ chambers in final whorl, chambers more inflated, and a wide apertural rim or plate

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: Low trochospiral, equatorial periphery strongly lobulate

Aperture: Interiomarginal umbilical-extraumbilical low arch with distinct rim or plate covering much of the umbilicus [Aze 2011, based on Kennett & Srinivasan 1983]


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

Test morphology: Test low trochospiral, equatorial periphery strongly lobulate , axial periphery rounded; chambers inflated, subspherical to ovate, 5 to 5½ in the final whorl; sutures on spiral and umbilical sides radial, depressed; surface distinctly reticulate with large circular pores and pore pits (Pl. 47, Fig. 1); umbilicus narrow , deep; aperture interiomarginal, extraumbilical-umbilical, a rather low arch with distinct rim or in the form of apertural plate covering much of the umbilicus. [Kennett & Srinivasan 1983]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Equally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:-
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:5.0-5.5 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Tropical to warm subtropical. [Kennett & Srinivasan 1983] 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): Pearson & Shackleton (1995)

Phylogenetic relations: N. acostaensis is distinguished from the phylogenetically unrelated form Gr. (I.) siakensis by its more inflated chambers, low aperture, and distinct apertural plate. N. acostaensis developed from N. continuosa in the earliest Late Miocene by developing more numerous and more inflated chambers in the final whorl and a wide apertural rim or plate. This species is ancestral to N. humerosa. The initial evolutionary appearance of N. acostaensis defines the base of Late Miocene Zone N16. N. acostaensis is restricted to tropical to warm subtropical areas. It seems that this form intergrades with N pachyderma in Late Miocene to early Pliocene sediments in temperate to polar areas (Srinivasan and Kennett, 1976; Kennett and Srinivasan, 1980). [Kennett & Srinivasan 1983]

Most likely ancestor: Paragloborotalia continuosa - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983, fig 21; Aze et al. 2011.
Likely descendants: Neogloboquadrina atlantica; Neogloboquadrina humerosa; Pulleniatina primalis;

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within PT1a subzone (0.61-1.88Ma, top in Ionian stage). Data source: Chaisson & Pearson (1997)
First occurrence (base): at base of M13a subzone (0% up, 9.8Ma, in Tortonian stage). Data source: Wade et al. (2011), zonal marker

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.196

References:

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

Blow, W. H. (1959). Age, correlation, and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozon Formations, eastern Falcon, Venezuela. Bulletins of American Paleontology. 39(178): 67-251. gs

Brönnimann, P. & Resig, J. (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Initial Reports of the Deep Sea Drilling Project. 7(2): 1235-1469. gs

Chaisson, W. P. & Pearson, P. N. P. (1997). Planktonic foraminifer biostratigraphy at Site 925: Middle Miocene–Pleistocene. Proceedings of the Ocean Drilling Program, Scientific Results,. 154: 3-31. gs

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

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. 401-410. 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 acostaensis compiled by the pforams@mikrotax project team viewed: 22-7-2019

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