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Species Globoquadrina praedehiscens Blow & Banner 1962


Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test large, equatorial periphery slightly lobulate, chambers spherical, those of final whorl strongly laterally compressed; three in the final whorl, increasing very rapidly in size as added; spiral sutures curved, depressed; umbilical sutures, radial, depressed, surface coarsely perforate; umbilicus narrow to fairly wide; aperture interiomarginal, umbilical, with distinct umbilical tooth.
Discussion / Comments:
Kennett & Srinivasan (1983):
Gq. praedehiscens is distinguished from Gq. dehiscens by possessing a more rounded and less quadrate test, three chambers in the final whorl, and a lower and narrower apertural face, which directly faces the umbilicus. This species differs from Gq. venezuelana in having three instead of four chambers in the final whorl and in having the chambers of the final whorl laterally more compressed.
Van Eijden & Smit (1991):
Remarks. G. praedehiscens is connected to Globigerina euapertura Jenkins, 1960), its probable ancestor, by intermediate forms. Aberrant final chambers occur commonly.
Systematics:

32
 Familia Globigerinidae
  Genus Globoquadrina
   Species Globoquadrina praedehiscens
Synonym list:
Kennett & Srinivasan (1983):
1962 Globoquadrina dehiscens praedehiscens Blow & Banner. - Blow & Banner : p.116 pl 15 figs Q-S
Van Eijden & Smit (1991):
1962 Globoquadrina dehiscens praedehiscens Blow & Banner. - Blow & Banner : p.116 pl. 15, figs. q-s
1991 Globoquadrina praedehiscens Blow & Banner. - Van Eijden & Smit : p.121 pl. 3, figs. 12-13
Vincent & Toumarkine (1990):
1962 Globoquadrina dehiscens praedehiscens Blow & Banner. - Blow & Banner : p. 116 pl. 15, figs. Q-S
1990 Globoquadrina praedehiscens Blow & Banner. - Vincent & Toumarkine : p. 835 pl. 6, figs. 18 and 19
References:

Blow,W.H. and Banner,F.T. (1962):
The Mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae.
In: Fundamentals of Mid‑Tertiary Stratigraphical Correlation Eds: Eames, F.E.Banner, F.T.Blow, W.H.Clarke, W.J. p. 61‑151

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

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
Anonymous: Unedited TaxonConcept data
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