Globorotalia (Menardella) praemenardii Cushman & Stainforth 1945 from: Kennett, J.Srinivasan, M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas. . |
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Species Globorotalia (Menardella) praemenardii Cushman & Stainforth 1945 |
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Alternative name: |
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Diagnosis / Definition: |
Kennett & Srinivasan (1983):
Test low trochospiral, equatorial periphery moderately lobulate, axial periphery acute with a narrow but distinct keel;
chambers compressed, five to six chambers in the final whorl, increasing rapidly in size;
sutures on spiral side strongly curved, flush on the early chambers, slightly raised on the later; on umbilical side slightly curved to radial, depressed; surface smooth, finely perforate; umbilicus narrow, shallow; aperture interiomarginal, extraumbilical-umbilical with a low slit, bordered by a lip. |
Synonym list: |
Kennett & Srinivasan (1983):
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Was used in synonym list of: |
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References: |
Cushman,J.A. and Stainforth,R.M. (1945): The foraminifers of the Cipero Marl Formation of Trinidad, British West Indies . Journal of Foraminiferal Research Vol. 14 p. 1-75
Kennett,J. and Srinivasan,M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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