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Species Globorotalia (Globoconella) praescitula Brady 1959 |
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| Diagnosis / Definition: |
Kennett & Srinivasan (1983):
Test low trochospiral, biconvex, equatorial periphery subangular, but not keeled, although some peripheral thickening occurs on the earlier chambers; chamber four
to four and one-half in the final whorl, increasing slowly in size; sutures on the spiral side strongly curved, depressed, on umbilical side slightly sinuous to radial, depressed; umbilical side distinctly convex to rather vaulted.
Surface uniformly perforate, smooth umbilicus small; aperture interiomarginal, umbilical-extraumbilical a low arch with a thin lip. |
| Discussion / Comments: |
Kennett & Srinivasan (1983):
Gr. (G.) praescitula is distinguished from its ancestor Gr. (G.) zealandica by an increase in number of chambers in the final whorl from four to four and one-half, an increase in curvature of the sutures on the umbilical side, peripheral compression, and a return to a low-arched aperture. |
| Synonym list: |
Kennett & Srinivasan (1983):
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| References: |
Blow,W.H. (1959):
Age, correlation and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozón Formations, eastern Falcon, Venezuela . Bull. Am. Paleontol. Vol. 39(178) p. 67-252
Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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