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Species Globigerina boweri Bolli 1957 | ||||||
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| Diagnosis / Definition: | ||||||
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Bolli (1957): Shape of test low trochospiral; equatorial periphery distinctly lobate (trilobate); axial periphery rounded. Wall calcareous, perforate, surface very finely pitted. Chambers spherical, early ones somewhat compressed and slightly subangular; about 12, arranged in about 2 1/2 whorls; the 3-3 1/2 chambers of the last whorl increase rapidly in size. Sutures on spiral side: in early stage radial to slightly curved, in late stage radial or oblique, depressed; on umbilical side radial, depressed. Umbilicus narrow. Aperture a distinct arch, commonly with a short lip or rim; interiomarginal, umbilical, with a tendency to become umbilical extraumbilical. Coiling predominantly dextral (90 percent or more) in the Hantkenina aragonensis and Globigerapsis kugleri zone, Navet formation. Largest diameter of holotype 0.4 min. |
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| Discussion / Comments: | ||||||
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Bolli (1957): Globigerina boweri, new species, differs from G. linaperta Finlay in having a higher arched aperture which has the tendency to be slightly extraumbilical in position. Especially the earlier chambers are somewhat compressed which gives them a slightly subangular aspect. The species is named for Mr. T. H. Bower, senior exploitation geologist of The Trinidad Oil Company. |
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| Was used in synonym list of: | ||||||
| References: | ||||||
Bolli,H.M. (1957): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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Taxon relations
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