Globorotalia wilcoxensis Cushman & Ponton 1932 from: Bolli, H.M. (1957): The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82 | . |
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Species Globorotalia wilcoxensis Cushman & Ponton 1932 |
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| Diagnosis / Definition: |
Bolli (1957):
Shape of test very low trochospiral, spiral side flat, occasionally slightly concave; umbilical side strongly convex and inflated; equatorial periphery lobate; axial periphery rounded, in last chambers often becoming acute. Wall calcareous, perforate, distinctly spinose. Chambers inflated, slightly compressed laterally; about 10, arranged in 2-2 1/4 whorls, the 4 chambers of the last whorl increasing rapidly in size, the last chamber often slightly reduced again. Sutures on spiral side oblique, depressed; on umbilical side radial, strongly depressed. Umbilicus narrow, deep, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Coiling about 85 percent dextral. Largest diameter of hypotype 0.48 mm. |
| Discussion / Comments: |
Bolli (1957):
Globorotalia wilcoxensis Cushman and Ponton is regarded as the ancestor of G. quetra Bolli, new species. |
| Synonym list: |
Bolli (1957):
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| References: |
Cushman,J.A. and Ponton,G.M. (1932):
An Eocene foraminiferal fauna of Wilcox age from Alabama . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 8 p. 51-72
Bolli,H.M. (1957):
The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
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