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Species Globorotalia (Truncorotalia) truncatulinoides d'Orbigny 1839 | ||||||
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| Diagnosis / Definition: | ||||||
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Kennett & Srinivasan (1983): Test low trochospiral, planoconvex, equatorial periphery almost circular, axial periphery acute with a distinct keel, chambers five in the final whorl, increasing slowly in size as added; sutures on spiral side straight to gently curved, flush to slightly depressed; on umbilical side almost radial, depressed;surface finely perforate, pustulate on umbilical as well as on spiral side; umbilicus wide deep, aperture interiomarginal, extraumbilical-umbilical, a low arch bordered by a lip. |
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| Discussion / Comments: | ||||||
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Kennett & Srinivasan (1983): Gr. (T.) truncatulinoides is distinguished from Gr. (T.) tosaensis by the presence of a pronounced keel and a more open umbilicus (PI. 34, Fig. 2). |
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| Kennett & Srinivasan (1983): 1839 Rotalia truncatulinoides d'Orbigny. - d'Orbigny : p.132 pl 2 figs 25-27
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| References: | ||||||
d'Orbigny,A.D. (1839): Kennett,J. and Srinivasan,M.S. (1983): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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