| . |
Notice: This catalogue page may contain unedited data.
To find validated information on this taxon please visit the following project pages: |
Species Globigerina (Globigerina) falconensis Blow 1959 |
|
|
|
| Alternative name: |
|
| Diagnosis / Definition: |
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. |
| Discussion / Comments: |
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. |
| Synonym list: |
Kennett & Srinivasan (1983):
|
| Was used in synonym list of: |
|
|
| References: |
Blow,W.H. (1959):
Age, correlation and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozón Formations, eastern Falcon, Venezuela . Bull. Am. Paleontol. Vol. 39(178) p. 67-252
Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.
|
This work is licensed under a Creative Commons Attribution 2.5 License.
|
Taxon Concept provided by