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Species Globigerina sp.1 Obregon 1959 | ||||||
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| Discussion / Comments: | ||||||
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Quilty (1976): Remarks: This species may be that recorded by Bronnimann and Resig (1969, pi. 5, fig. 7) as G. venezuelana. The specimens in 319-1-4, 100-102 cm are distinctly different from G. venezuelana in the same sample. They have a slightly depressed spire with otherwise the same coiling characters as G. venezuelana. The chambers are more flattened distally so the dorsal view is typical of the more inflated members of the Globoquadrina dehiscens group. There are no globoquadrine teeth or toothlike projections over the aperture, but often there is a final chamber significantly reduced in size. The apertural face is flattened, the aperture is very large, and there is no lip or rim on the aperture. The ventral parts of many chambers are spinose in a form reminiscent of G. conglomerata. The species has the appearance of being a direct descendant of Globoquadrina dehiscens advena by loss of the tooth and enlargement of the aperture at the expense of the apertural face which has otherwise maintained its globoquadrine characteristic. |
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| Synonym list: | ||||||
| Quilty (1976): 1976 Globigerina sp.1 Obregon. - Quilty : p.675 pl. 5, figs. 1-2
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| Was used in synonym list of: | ||||||
| References: | ||||||
Quilty,P.G.. (1976): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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Taxon relations
Ranking (experimental) |
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