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Globorotalia challengeri Srinivasan & Kennett 1981 from: Chaisson, W.P.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
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Anonymous: Unedited TaxonConcept data
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Species Globorotalia challengeri Srinivasan & Kennett 1981


Alternative name:
Discussion / Comments:
Chaisson & Leckie (1993):
Remarks: A temperate zone species found in low numbers at this tropical site. Similar species: Globorotalia challengeri looks like a tiny, delicate Paragloborotalia mayeri. In addition to being distinctly smaller, G. challengeri has a more circular equatorial profile and a lower arched aperture than P. mayeri. It differs from early forms of Neogloboquadrina acostaensis in lacking the distinctive apertural flap or kümmerform-like final chamber commonly developed on N. acostaensis, and in having a final chamber that is distinctly ovate in equatorial view as compared with the spherical chambers developed in species of Neogloboquadrina. In addition, the wall of G. challengeri is coarsely perforate on the early whorls and on the earliest chambers of the final whorl, and then becomes more finely perforate with each successive chamber. N. acostaensis, on the other hand, is more or less uniformly perforate throughout its ontogeny.
Synonym list:
Chaisson & Leckie (1993):
1981 Globorotalia challengeri Srinivasan & Kennett. - Srinivasan & Kennett : 499-533 pl. 1
1983 Globorotalia (Hirsutella) challengeri Srinivasan & Kennett. - Kennett & Srinivasan : p.142 pl. 33; fig. 7-9
1993 Globorotalia challengeri Srinivasan & Kennett. - Chaisson & Leckie : p.172 pl. 4; fig. 1-5
Was used in synonym list of:
Stratigraphy - absolute ages:
LAD: 9.99 ± 0 [Ma], Turco et al. (2002) ODP Leg 154 Site 926
FAD: 11.14 ± 0 [Ma], Turco et al. (2002) ODP Leg 154 Site 926
References:

Srinivasan,M.S. and Kennett,J.P. (1981):
Neogene planktonic foraminiferal biostratigraphy and evolution: equatorial to subantarctic, South Pacific. . Marine Micropaleontology Vol. 6 p. 499-533

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

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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