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Species Globorotalia (Globorotalia) merotumida Blow & Banner 1965 |
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| Diagnosis / Definition: |
Kennett & Srinivasan (1983):
Test very low trochospiral, biconvex, equatorial periphery slightly lobulate, axial periphery acute with a distinct keel; five to six wedge-shaped chambers in the final
whorl; chambers more inflated on umbilical side than on spiral side; spiral sutures limbate, slightly raised, thickened, curved, merging with the keel; on umbilical side gently curved to radial depressed; surface smooth, densely perforate, slightly pustulate near the aperture or umbilical side; umbilicus narrow, aperture interiomarginal, umbilical-extraumbilical, low arch with a thick lip. |
| Discussion / Comments: |
Kennett & Srinivasan (1983):
Gr. (Gr.) merotumida differs from Gr. (Gr.) paralenguaensis in having a distinct keel and limbate sutures on the spiral side. It is distinguished from Gr. (Gr.) plesiotumida by its smaller size, slightly more convex umbilical side, less ovate equatorial profile, and the height and width of the final chamber (in merotumida the final chamber is wider than the height). |
| Synonym list: |
Kennett & Srinivasan (1983):
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| References: |
Banner,F.T. and Blow,W.H. (1965):
Two new taxa of the Globorotaliinae (Globigerinacea, Foraminfera) assisting determination of the late Miocene/middle Miocene boundary . Nature Vol. 207
Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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