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Globoquadrina dehiscens Chapman et al. 1934 from: Bolli, H.M. (1957): Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I.. In: Studies in Foraminifery, Bulletin of the U.S. National Museum Vol. 215 Eds: Loeblich, A.R.Tappan, H.Beckmann, J.P.Bolli, H.M.Gallitelli, E.M.Troelsen, J.C. p. 97-123
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Species Globoquadrina dehiscens Chapman et al. 1934


Discussion / Comments:
Bolli & Saunders (1985):
The distinctive quadrate, compressed test with its rather angular chambers and flat spiral side distinguishes this species group from G. altispira s.l. Some less typical forms approach species of Globigerina found in the Oligocene but the latter are not so characteristically 4 chambered in the last whorl.
Bolli (1957):
Globoquadrina quadraria (Cushman and Applin) and G. quadraria var. advena Bermudez are apparently closely related to G. dehiscens. Although some variation can be observed in the Cipero and Lengua specimens, they are here all placed in G. dehiscens.
Van Eijden & Smit (1991):
Remarks. G. dehiscens is common to abundant in the Oligocene-Miocene at Sites 752, 754, and 756. Aberrant final chambers are very common.
Chaisson & Leckie (1993):
Remarks: The LO of this species is above the FO of Globorotalia tumida in Hole 806B. The same stratigraphic relationship is noted by Srinivasan and Kennett (1981a, 1981b) in DSDP Hole 289B. The FO of Globoquadrina dehiscens marks the top of Subzone N4a/base of Subzone N4b (Kennett and Srinivasan, 1983). G. dehiscens is a fairly persistent taxon throughout the Miocene of Hole 806B, but it disappears in Zone N16 and part of Subzone N17b (upper Miocene) and has sporadic bursts of high abundance in the middle Miocene. Similar species: The final chamber of G. dehiscens is distinctly flattened and mostly imperforate, and its chambers are more angular and embracing than G. baroemoenensis.
Systematics:

1
 Superregnum Eukaryota
  Regnum Protoctista
   Phylum Ciliophora
    Subphylum Postciliodesmatophora
     Ordo Globigerinida
      Superfamilia Globorotaliaceae
       Superfamilia Nonionacea
        Familia Catapsydracidae
         Genus Globoquadrina
          Species Globoquadrina dehiscens

21
  Genus Globoquadrina
   Species Globoquadrina dehiscens

32
 Ordo Foraminiferida
  Familia Globigerinidae
   Genus Globoquadrina
    Species Globoquadrina dehiscens
Synonym list:
Kennett & Srinivasan (1983):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl 11 figs 36 a-c
Chaisson & d'Hondt (2000):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl 11, figs 36 a-c
1983 Globoquadrina dehiscens Chapman et al.. - Kennett & Srinivasan : p.184 pl 44. fig 2, pl 45 figs 7-9
Bolli & Saunders (1985):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl. 11, fig. 6
1939 Globorotalia quadraria Cushman & Ellisor. - Cushman & Ellisor : p.11 pl. 2, fig. 5
1947 Globoquadrina subdehiscens Finlay. - Finlay : p.291
1985 Globoquadrina dehiscens Chapman et al.. - Bolli & Saunders : p.184 figs. 15.4-7; 6, 9, 12
Chaisson & Pearson (1997):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl. 11; fig. 36a-c
1983 Globoquadrina dehiscens Chapman et al.. - Kennett & Srinivasan : p.184 pl. 44; fig. 2 pl. 45; fig. 7-9
Bolli (1957):
1934 Globoquadrina dehiscens Chapman et al.. - Chapman et al. : p. 569 pl. 11, figs. 36a-c
1957 Globoquadrina dehiscens Chapman et al.. - Bolli : pl. 24, figs. 3a-4c
Van Eijden & Smit (1991):
1934 Globoquadrina dehiscens Chapman et al.. - Chapman et al. : p.569 pl. 11, figs. 36a-c
1991 Globoquadrina dehiscens Chapman et al.. - Van Eijden & Smit : p.111
Srinivasan (1975):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl. 11; fig. 36a-c
1975 Globoquadrina dehiscens Chapman et al.. - Srinivasan : p.145 pl. 2; fig. 16-18
Vincent & Toumarkine (1990):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p. 596 pl. 11, fig. 36
1990 Globoquadrina dehiscens Chapman et al.. - Vincent & Toumarkine : p. 835 pl. 6, fig. 17
Chaisson & Leckie (1993):
1934 Globorotalia dehiscens Chapman et al.. - Chapman et al. : p.569 pl. 11; fig. 36a-c
1983 Globoquadrina dehiscens Chapman et al.. - Kennett & Srinivasan : p.184 pl. 44, fig. 2; pl. 45, fig. 7-9
1993 Globoquadrina dehiscens Chapman et al.. - Chaisson & Leckie : p.177 pl. 9; fig. 14-16
Stratigraphy - absolute ages:
LAD: 5.8 ± 0 [Ma], Berggren et al. (1995)
LAD: 5.8 ± 0 [Ma], Berggren et al. (1995)
References:

Chapman,F.; Parr,W.J. and Collins,A.C. (1934):
Tertiary foraminifers of Victoria, Australia: the Balcombian deposits of Port Philip (Pt. III). . Journal of the Linnenan Society of London Vol. 38(262) p. 569

Cushman,J.A. and Ellisor,A.C. (1939):
New species of foraminifers from the Oligocene and Miocene . Cushman Lab. Foraminiferal Res. Contrib. Vol. 15(1) p. 1-14

Finlay,H.J. (1947):
New Zealand foraminifera; key species in stratigraphy, No. 5 . New Zealand Journal of Science and Technology section B Vol. 28 p. 259-292

Bolli,H.M. (1957):
Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I..
In: Studies in Foraminifery, Bulletin of the U.S. National Museum Vol. 215 Eds: Loeblich, A.R.Tappan, H.Beckmann, J.P.Bolli, H.M.Gallitelli, E.M.Troelsen, J.C. p. 97-123

Srinivasan,M.S. (1975):
Middle Miocene Planktonic Foraminifera from the Hut Bay Formation, Little Andaman Island, Bay of Bengal . Micropaleontology Vol. 21(2) p. 133-150

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

Bolli,H.M. and Saunders,J.B. (1985):
Oligocene to Holocene low latitude planktic foraminifers.
In: Plankton Stratigraphy Eds: Bolli, H.M.Saunders, J.B. p. 155-262

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

Van Eijden,A.J.M. and Smit,J. (1991):
Eastern Indian Ocean Cretaceous and Paleogene quantitative biostratigraphy.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 121 Eds: Weissel, J.Peirce, J.Taylor, E.Alt, J. p. 77-123

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.; Hilgen,F.J.; Langereis,C.G.; Kent,D.V.; Obradovich,J.D.; Raffi,I.; Raymo,M.E. and Shackleton,N.J. (1995):
Late Neogene chronology: New perspectives in high-resolution stratigraphy . Geological Society of America Bulletin Vol. 107(11)

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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