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Species Globorotalia (Globoconella) praescitula Brady 1959 | ||||||
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| Diagnosis / Definition: | ||||||
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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. |
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| Discussion / Comments: | ||||||
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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. |
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| Kennett & Srinivasan (1983): 1959 Globorotalia scitula praescitula Blow. - Blow : p.221 pl 19 figs 128 a-c
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| References: | ||||||
Blow,W.H. (1959): Kennett,J. and Srinivasan,M.S. (1983): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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