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Species Globigerina (Globigerina) falconensis Blow 1959 | ||||||
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| Diagnosis / Definition: | ||||||
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Kennett & Srinivasan (1983): Test low trochospiral, slightly compressed, with four chambers in the final whorl; chambers spherical, increasing slowly in size as added; the last chamber typically smaller than the penultimate; sutures on both sides radial, depressed; surface with small, regu- larly distributed pores and thin, simple spines. Umbilicus small but deep, partly covered by a strongly developed lip of the final chamber. Aperture an elongate narrow arch, interiomarginal, umbilical. |
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| Discussion / Comments: | ||||||
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Kennett & Srinivasan (1983): Gg. (Gg.) falconensis closely resembles Gg. (Gg.) praebulloides Blow and Gg. (Gg.) bulloides d'Orbigny but differs in having the final chamber with well-developed imperforate lip. Earlier nonbiometric studies suggested that Gg. (Gg.) falconensis and Gg. (Gg.) bulloides may represent subspecies or phenotypic variants of a single species; however, biometric analysis by Malmgren and Kennett (1977) revealed that these two forms tend to react as different species in all essential foraminiferal parameters, and therefore the taxonomic distinction between these forms should be retained. This species appears to have evolved from Gg. (Gg.) praebulloides during the Early Miocene. |
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| Synonym list: | ||||||
| Kennett & Srinivasan (1983): 1959 Globigerina falconensis Blow. - Blow : p.177 pl 9 figs 40 a-c, 41
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| References: | ||||||
Blow,W.H. (1959): Kennett,J. and Srinivasan,M.S. (1983): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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