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Species Neogloboquadrina continuosa Blow 1959


Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test low trochospiral, equatorial periphery lobulate, axial periphery rounded, chambers subspherical to ovate, four in the final whorl, increasing rapidly in size; sutures on spiral and umbilical sides radial, depressed; surface coarsely pitted; umbilicus narrow, deep; aperture interiomarginal, umbilical-extraumbilical, a rather low arch bordered by a distinct rim.
Discussion / Comments:
Kennett & Srinivasan (1983):
N. continuosa is distinguished from "Globorotalia" nana by its high-arched aperture with a pronounced apertural rim and a rather more coarsely pitted surface. N. continuosa appears to have developed from "Globorotalia" nana and is ancestral to N. acostaensis. However, Bolli and Saunders (1982) considered N. continuosa as a four chambered variant of Gr. (J.) mayeri.
Chaisson & Pearson (1997):
Single specimens are found above the published (Kennett and Srinivasan, 1983) global last appearance.
Chaisson & Leckie (1993):
Similar species: Neogloboquadrina continuosa is separated from Paragloborotalia nana by its more lobate chambers and a distinctively arched aperture.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Globorotaliidae
         Genus Neogloboquadrina
          Species Neogloboquadrina continuosa
Synonym list:
Kennett & Srinivasan (1983):
1959 Globorotalia opima continuosa Blow. - Blow : p.218 pl 19, figs 125 a-c.
Chaisson & d'Hondt (2000):
1959 Globorotalia opima continuosa Blow. - Blow : p.218 pl 19, figs 15a-c
1983 Neogloboquadrina continuosa Blow. - Kennett & Srinivasan : p.192 pl 47 figs 3-5
Chaisson & Pearson (1997):
1959 Globorotalia opima continuosa Blow. - Blow : p.218 pl. 19; fig. 125a-c
1983 Neogloboquadrina continuosa Blow. - Kennett & Srinivasan : p.192 pl. 47; fig. 3-5
Chaisson & Leckie (1993):
1959 Globorotalia opima continuosa Blow. - Blow : p.218 pl. 19; fig. 125a-c
1983 Neogloboquadrina continuosa Blow. - Kennett & Srinivasan : p.192 pl. 47; fig. 3-5
1993 Neogloboquadrina continuosa Blow. - Chaisson & Leckie : p.176 pl. 8; fig. 12-15
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.

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

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
Anonymous: Unedited TaxonConcept data
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