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Species Globorotalia pseudomenardii Bolli 1957 | ||||||
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| Diagnosis / Definition: | ||||||
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Bolli (1957): Shape of test very low trochospiral, biconvex; equatorial periphery elongate, lobate, especially so in large specimens; axial periphery angular with distinct keel. Wall calcareous, perforate, surface smooth. Chambers strongly compressed; about 15, arranged in 3 whorls, the 5 chambers of the last whorl increasing rapidly in size. Sutures on spiral side strongly curved, especially so between last chambers of large specimens, depressed; on umbilical side radial, depressed. Umbilicus shallow, open. Aperture a low arch with a lip; interiomarginal, extraumbilical umbilical. Largest diameter of holetype 0.34 mm., of figured paratype 0.66 mm. |
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| Discussion / Comments: | ||||||
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Bolli (1957): Globorotalia pseudomenardii Bolli, new species, is closely related to G. ehrenbergi Bolli, new species, from which it apparently developed and from which it is distinguished by its less lobate periphery and less depressed spiral sutures. The name has been chosen for the resemblance to small specimens of G. menardii (d'Orbigny), to which it has no genetic relationship however. G. pseudomenardii becomes extinct at the close of the Paleocene whereas G. menardii appears first in the middle to upper Miocene. |
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| Systematics: | ||||||
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20 Genus Globorotalia Species Globorotalia ehrenbergi Species Globorotalia pseudomenardii Species Globorotalia quadrata Species Globorotalia velascoensis 32 Ordo Foraminiferida Familia Globorotaliidae Genus Globorotalia Species Globorotalia pseudomenardii |
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| Synonym list: | ||||||
| Bolli (1957): ? 1937 Globorotalia pseudoscitula Glaessner. - Glaessner : pp. 32-33 figs. 3a-c
1957 Globorotalia pseudomenardii Bolli. - Bolli : pl. 20, figs. 14-17 new species
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| Was used in synonym list of: | ||||||
| References: | ||||||
Glaessner,M.F. (1937): Bolli,H.M. (1957): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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