_USNM 625697_holo.jpg)
| Daughter taxa: (blue => in age window 0-800Ma) | ||||
| Extant and eogene species | ||||
| | | Usually 4 chambers in final whorl; Aperture a high symmetrical arch. | |
| | | 4 chambers in final whorl; Umbilicus small but deep; Aperture an elongate narrow arch with prominent lip | |
| | | 5-6 chambers in final whorl; often with kummerform final chamber. Umbilicus very large, deep. Aperture large, umbilical, with thin lip. | |
| Paleogene species | ||||
| | | Like G. officinalis but with lobed peripheral outline, and fully developed bulloides-type wall | |
| | | Small, chambers globular, slightly embracing; aperture moderately high-arched with a thickened rim; bulloides-type wall texture. | |
| Specimens which cannot be assigned to established species | ||||
[Olsson et al. 2006]
Catalog entries: Globigerina
Distinguishing features: Low trochospirally enrolled, globose test; 3-5, globular chambers in final whorl. Aperture interiomarginal, umbilical, a high arch bordered by a thin rim-like lip or thick imperforate lip. Wall spinose; spines supported by spine collars which coalesce to form ridges.
NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
Diagnostic characters: Low trochospirally enrolled, globose test, with 3-5 rapidly inflating, globular chambers in ultimate whorl. Aperture interiomarginal, umbilical, a high arch bordered by a thin rim-like lip or thick imperforate lip. Umbilicus varies from small and restricted to large and open. Wall spinose; spines are supported by spine collars which coalesce to form ridges.
[Olsson et al. 2006]
Geographic distribution:
Isotope paleobiology:
Phylogenetic relations: The origin of Globigerina is uncertain. In wall texture it appears closest to Subbotina roesnaesensis n. sp., which has a ruber-type cancellate wall texture with spine collars (first observed in its ancestral species Subbotina triangularis in Zone P4).
[Olsson et al. 2006]
Similar species:
Most likely ancestor: Subbotina - at confidence level 0 (out of 5). Data source: .
Likely descendants: Beella; Globigerinella; Sphaeroidinellopsis;
Geological Range:
Notes: Middle Eocene (E10) to Recent.
[Olsson et al. 2006]
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): in upper part of Lutetian Stage (69% up, 43.2Ma, in Lutetian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 6, p. 114
d'Orbigny, A. (1826). Tableau methodique de la Classe de Cephalopodes. Annales des Sciences Naturelles, Paris. 7: 245-314. gs V O Hemleben, C., Spindler, M. & Anderson, O. (1989). Modern Planktonic Foraminifera. Springer-Verlag, New York. -. gs Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006a). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 6): 111-168. gs V OReferences:
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Globigerina compiled by the pforams@mikrotax project team viewed: 27-9-2020
Short stable page link: http://mikrotax.org/pforams/index.php?id=100107 Go to Archive.is to create a permanent copy of this page - citation notes |