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Species Globorotalia challengeri Srinivasan & Kennett 1981 | ||||||
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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. |
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| 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
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| 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 |
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| References: | ||||||
Srinivasan,M.S. and Kennett,J.P. (1981): Kennett,J. and Srinivasan,M.S. (1983): Chaisson,W.P. and Leckie,R.M. (1993): Turco,E.; Bambini,A.M.; Foresi,L.; Iaccarino,S.; Lirer,F.; Mazzei,R. and Salvatorini,G. (2002): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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