_USNM-183690_holo2.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;
Type images: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]
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]
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. Annals des Sciences Naturelles, Paris, 7: 245-314. GS 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., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. In: Pearson, P.N., Olsson, R.K., Hemleben, C., Huber, B.T. and Berggren, W.A. (Editors), Atlas of Eocene Planktonic Foraminifera. Cushman Foundation Special Publication. Allen Press, Lawrence, Kansas, pp. 111-168. GSReferences:
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Globigerina compiled by the pforams@mikrotax project team viewed: 25-3-2019
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 |