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Subspecies Globorotalia pusilla laevigata Bolli 1957 | ||||||
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| Diagnosis / Definition: | ||||||
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Bolli (1957): Shape of test low trochospiral, biconvex, compressed; equatorial periphery circular, slightly lobate; axial periphery acute, last chambers often with a faint keel. Wall calcareous, perforate, surface smooth. Chambers strongly compressed; 12-16, arranged in about 3 whorls; the 5-6 chambers of the last chamber increasing moderately in size. Sutures on spiral side strongly curved; on umbilical side radial. Umbilicus narrow, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Largest diameter of holotype 0.28 min. |
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| Discussion / Comments: | ||||||
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Bolli (1957): Globorotalia pusilla laevigata Bolli, new species, new subspecies, is closely related to G. pusilla pusilla Bolli, new species, new subspecies, from which it develops. The subspecies laevigata is distinguished from the subspecies pusilla by its more circular outline and acute axial periphery and by its spiral sutures not being depressed. |
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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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