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Species Globorotalia (Truncorotalia) tosaensis Takayangi & Saito 1962 | ||||||
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| Diagnosis / Definition: | ||||||
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Kennett & Srinivasan (1983): Test low trochospiral, spiral side flat to concave, umbilical side strongly convex giving the test a conical appearance; equatorial periphery almost circular; axial periphery subrounded to subacute; chambers inflated, commonly five in the final whorl, increasing fairly rapidly in size; sutures on spiral side gently curved and somewhat flush to gently depressed, on umbilical side almost radial, depressed, surface finely perforate, pustulate on umbilical side and on early chambers on spiral side; umbilicus narrow, deep; aperture interiomarginal, extraumbilical-umbilical, a low slit bordered by a lip. |
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| Discussion / Comments: | ||||||
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Kennett & Srinivasan (1983): Gr. (T.) tosaensis resembles Gr. (T.) truncatulinoides in general appearance but is distinguished primarily by the absence of a peripheral keel . It differs from Gr. (T.) crassaformis in its rounded equatorial profile and by having more than four chambers in the final whorl. |
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| Kennett & Srinivasan (1983): 1962 Globorotalia tosaensis Takayanagi & Saito. - Takayanagi & Saito : p.81 pl 28 figs 11a-12c
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| References: | ||||||
Takayanagi,Y. and Saito,T. (1962): Kennett,J. and Srinivasan,M.S. (1983): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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