Globorotalia (Hirsutella) bermudezi Rögl & Bolli 1973 from: Kennett, J.Srinivasan, M.S. (1983): Neogene Planktonic Foraminifera - A Phylogenetic Atlas. | . |
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Species Globorotalia (Hirsutella) bermudezi Rögl & Bolli 1973 |
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| Diagnosis / Definition: |
Kennett & Srinivasan (1983):
Test very small, low trochospiral, equatorial periphery subcircular, lobulate, axial periphery broadly rounded to subangular, slightly biconvex; five to six chambers
in the final whorl; increasing uniformly in size as added, chambers on umbilical side more inflated; sutures on spiral side curved, depressed; on umbilical side sinuously radial,
depressed; surface thin, smooth, with irregularly distributed small, circular pores;
umbilicus open, deep; aperture a low arch with a distinct but thin lip, interiomarginal, umbilical-extraumbilical. |
| Discussion / Comments: |
Kennett & Srinivasan (1983):
Gr. (H.) bermudezi is considered to have evolved from Gr. (H.) scitula in the latest Pliocene. Gr. (H.) bermudezi is much
smaller, possesses inflated chambers on the umbilical side, and exhibits a more irregularly perforated test than G. (H.) scitula.
Because of its very small size, this species has not been identified by many workers. |
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Kennett & Srinivasan (1983):
1973 Globorotalia bermudezi Rögl & Bolli. - Rögl & Bolli : p.567 pl 6 figs 16-20, pl 16 figs 1-3, text figs 6a-c
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| References: |
Rögl,F. and Bolli,H.M. (1973):
Holocene to Pleistocene planktonic foraminifera of Leg 15, Site 147 (Cariaco Basin (Trench), Caribbean Sea) and their climatic interpretation.
In: Initial Reports of the Deep Sea Drilling Project Vol. 15 Eds: Edgar, N.T. p. 553-616
Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
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