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Neogloboquadrina acostaensis Blow 1959 from: Vincent, E.Toumarkine, M. (1990): Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115. In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836
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Species Neogloboquadrina acostaensis Blow 1959


Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test low trochospiral, equatorial periphery strongly lobulate, axial periphery rounded; chambers inflated, subspherical to ovate, five to five and one-half in the final whorl; sutures on spiral and umbilical sides radial, depressed; surface distinctly reticulate with large circular pores and pore pits (PI. 47, Fig. 1); umbilicus narrow, deep; aperture interiomarginal, xtraumbilical-umbilical, a rather low arch with distinct rim or in the form of apertural plate covering much of the umbilicus.
Discussion / Comments:
Kennett & Srinivasan (1983):
N. acostaensis is distinguished from the phylogenetically unrelated form Gr. (J.) siakensis by its more inflated chambers, low aperture, and distinct apertural plate.
Chaisson & Pearson (1997):
Kennett and Srinivasan (1983) show an early Pliocene extinction for this species. Berggren et al. (1985) give an age of 5.1 Ma (transformed to Leg 154 time scale) for its LO, an event that was verified by Chaisson and Leckie (1993) in the western equatorial Pacific. Bolli and Saunders (1985) show a stratigraphic range that extends to the Recent. The LO at Site 925 is at approximately the Pliocene/Pleistocene boundary. Either this species has a very diachronous LO or there are taxonomic difficulties, as suggested by Loubere and Moss (1986) with their designation of a acostaensis-pachyderma intergrade. In Samples 154-925B-7H-5, 65-67 cm, and 4H-6, 65-67 cm, both N. acostaensis and N. acostaensispachyderma intergrade are more abundant than the “dutertrei” morphotype.
Chaisson & Leckie (1993):
Remarks: Many specimens of this species found at this site are relatively large, more nearly the size of Neogloboquadrina humerosa. Similar species: Large specimens resemble N. humerosa, but the latter species lacks an apertural flap, its aperture is more open, and it usually has six chambers in the final whorl (e.g., see Plate 8, Fig. 6). N. acostaensis differs from Globorotalia challengeri in possessing an apertural flap or kümmerformlike final chamber, and in being uniformly perforate. See G. challengeri.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Globorotaliidae
         Genus Neogloboquadrina
          Species Neogloboquadrina acostaensis
Synonym list:
Kennett & Srinivasan (1983):
1959 Globorotalia acostaensis Blow. - Blow : p.208 pl 17 figs 106a-c
Chaisson & d'Hondt (2000):
1959 Globorotalia acostaensis Blow. - Blow : p.208 pl 17 figs 106a-c
1983 Neogloboquadrina acostaensis Blow. - Kennett & Srinivasan : p.196 pl 47 figs 1-3
Chaisson & Pearson (1997):
1959 Globorotalia acostaensis Blow. - Blow : p.208 pl. 17; fig. 106a-c
1983 Neogloboquadrina acostaensis Blow. - Kennett & Srinivasan : p.196 pl. 47; fig. 1 pl. 48; fig. 1-3
1997 Neogloboquadrina acostaensis Blow. - Chaisson & Pearson : p.31 pl. 2; fig. 24
Vincent & Toumarkine (1990):
1959 Globorotalia acostaensis Blow. - Blow : p.208 pl.17, fig.106
1990 Neogloboquadrina acostaensis Blow. - Vincent & Toumarkine : p.836 pl.7, figs.3-6, 10-11
Chaisson & Leckie (1993):
1959 Globorotalia acostaensis Blow. - Blow : p.208 pl. 17; fig. 106a-c
1983 Neogloboquadrina acostaensis Blow. - Kennett & Srinivasan : p.196 pl. 47, fig. 1; pl. 48, fig. 1-3
1993 Neogloboquadrina acostaensis Blow. - Chaisson & Leckie : p.176 pl. 8; fig. 5
Stratigraphy - absolute ages:
S-D: 6.2 ± 0 [Ma], Berggren et al. (1995)
D-S: 6.6 ± 0 [Ma], Berggren et al. (1995)
FAD: 10.9 ± 0 [Ma], Berggren et al. (1995)
FAD: 10.3 ± 0.01 [Ma], Chaisson & d'Hondt (2000) ODP Leg 165 Site 999
LAD: 1.58 ± 0 [Ma], Chaisson & Pearson (1997) ODP Leg 154 Site 925
FAD: 9.82 ± 0 [Ma], Chaisson & Pearson (1997) ODP Leg 154 Site 925
FAD: 9.89 ± 0 [Ma], Turco et al. (2002) ODP Leg 154 Site 926
References:

Blow,W.H. (1959):
Age, correlation and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozón Formations, eastern Falcon, Venezuela . Bull. Am. Paleontol. Vol. 39(178) p. 67-252

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Vincent,E. and Toumarkine,M. (1990):
Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836

Chaisson,W.P. and Leckie,R.M. (1993):
High-Resolution Planktonic Foraminifer Biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..et al. p. 137-178

Berggren,W.A.; Kent,D.V.; Swisher,C.C. and Aubry,M.P. (1995):
A revised Cenozoic Geochronology and Chronostratigraphy.
In: Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication Vol. 54

Chaisson,W.P. and Pearson,P.N. (1997):
Planktonic foraminifer biostratigraphy at Site 925: middle Miocene–Pleistocene.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 154 Eds: Shackleton, N.J.Curry, W.B.Richter, C.Bralower, T.J.

Chaisson,W.P. and d'Hondt,S.L. (2000):
Neogene planktonic foraminifer biostratigraphy at Site 999, Western Caribbean Sea.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 165 Eds: Leckie, R.M.Sigurdsson, H.Acton, G.D.Draper, G. p. 19-56

Turco,E.; Bambini,A.M.; Foresi,L.; Iaccarino,S.; Lirer,F.; Mazzei,R. and Salvatorini,G. (2002):
Middle Miocene high-resolution calcareous plankton biostratigraphy at Site 926 (Leg 154, equatorial Atlantic Ocean): palaeoecological and palaeobiogeographical implications . GeobiosMemoire spec. 24 p. 257-276
Anonymous: Unedited TaxonConcept data
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