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| Anonymous: Unedited TaxonConcept data | ||||||
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Subspecies Globorotalia formosa gracilis Bolli 1957 | ||||||
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| Diagnosis / Definition: | ||||||
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Bolli (1957): Shape of test very low trochospiral, spiral side almost flat or slightly convex, umbilical side distinctly convex; equatorial periphery lobate: axial periphery angular with a faint keel ornamented with spines. Wall calcareous, perforate, surface distinctly spinose. Chambers angular, inflated; about 12, arranged in 2-2 1/2 3 whorls, the 5-6 chambers of the last whorl increasing rapidly in size. Sutures on dorsal side slightly curved to oblique, slightly depressed; on umbilical side radial, distinctly depressed. Umbilicus fairly narrow, deep, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Coiling between 90 and 100 percent dextral. Largest diameter of holotype 0.50 mm. |
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| Discussion / Comments: | ||||||
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Bolli (1957): Globorotalia formosa gracilis Bolli, new species, new subspecies, differs from the related G. aequa Cushman and Renz in possessing a more distinct but thinner peripheral keel and more chambers in the last whorl. G. formosa gracilis is regarded as the ancestor of G. formosa formosa Bolli, new species, new subspecies. |
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| Synonym list: | ||||||
| Bolli (1957): 1957 Globorotalia formosa gracilis Bolli. - Bolli : pl. 18, figs. 4-6 new species, new subspecies
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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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