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Species Neogloboquadrina humerosa Takayanagi & Saito 1962


Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test low trochospiral, equatorial periphery lobulate; axial periphery rounded, chambers ovate, six to seven in the final whorl, final often irregular; sutures on both spiral and umbilical sides radial, depressed; surface distinctly cancellate; umbilicus wide, deep; aperture interiomarginal, umbilical-extraumbilical, a low to medium arch bordered by a distinct rim.
Discussion / Comments:
Kennett & Srinivasan (1983):
N. humerosa differs from its forerunner N. acostaensis in having more chambers in the final whorl (usually six or more), a wider umbilicus, and a reduced apertural lip. This species is distinguished from TV. dutertrei by having an interiomarginal, umbilical-extraumbilical aperture with a distinct rim, and an absence of umbilical plates.
Chaisson & Leckie (1993):
Remarks: Neogloboquadrina humerosa sensu stricto is very rare at this site. Specimens with only five chambers in the final whorl, but with "an interiomarginal, umbilical-extraumbilical aperture with a distinct rim" (Kennett and Srinivasan, 1983) and a flat dorsal side were assigned to this species concept. Specimens that resembled an intergrade between N. humerosa and N. dutertrei were found as low as the middle part of Zone N16 in Hole 806B. Similar species: Neogloboquadrina dutertrei tends to have slightly higher and more variable dorsal convexity than N. humerosa, as well as the tendency to develop umbilical plates.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Globorotaliidae
         Genus Neogloboquadrina
          Species Neogloboquadrina humerosa
Synonym list:
Kennett & Srinivasan (1983):
1962 Globorotalia humerosa Takayanagi & Saito. - Takayanagi & Saito : p.78 pl 28 figs la-2b
Chaisson & d'Hondt (2000):
1962 Globorotalia humerosa Takayanagi & Saito. - Takayanagi & Saito : p.78 pl 28 figs 1a-2b
1983 Neogloboquadrina humerosa Takayanagi & Saito. - Kennett & Srinivasan : p.196 pl 28 figs 1a-2b
Chaisson & Pearson (1997):
1962 Globorotalia humerosa Takayanagi & Saito. - Takayanagi & Saito : p.78 pl. 28; fig. 1a-2b
1983 Neogloboquadrina humerosa Takayanagi & Saito. - Kennett & Srinivasan : p.196 pl. 28; fig. 1a-2b
Vincent & Toumarkine (1990):
1962 Globorotalia humerosa Takayanagi & Saito. - Takayanagi & Saito : p.78 pl.28, figs.1-2
1990 Neogloboquadrina humerosa Takayanagi & Saito. - Vincent & Toumarkine : p.836 pl.7, figs.7-9
Chaisson & Leckie (1993):
1962 Globorotalia humerosa Takayanagi & Saito. - Takayanagi & Saito : p.78 pl. 28; fig. 1a-2b
1983 Neogloboquadrina humerosa Takayanagi & Saito. - Kennett & Srinivasan : p.196 pl. 28; fig. 1a-2b
1993 Neogloboquadrina humerosa Takayanagi & Saito. - Chaisson & Leckie : p.176 pl. 8; fig. 7-8
Stratigraphy - absolute ages:
FAD: 8.5 ± 0 [Ma], Berggren et al. (1995)
References:

Takayanagi,Y. and Saito,T. (1962):
Planktonic foraminifers from the Nobori Formation, Shikoku, Japan. . Science Reports of the Tohoku University Serie 2 Vol. 5 p. 67-106

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
Anonymous: Unedited TaxonConcept data
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