Turborotalita


Classification: pf_cenozoic -> spinose -> Globigerinidae -> Turborotalita
Sister taxa: Catapsydrax, Eoglobigerina, Globigerina, Globigerinatheka, Globorotaloides, Globoturborotalita, Guembelitrioides, Orbulinoides, Paragloborotalia, Parasubbotina, Pseudoglobigerinella, Subbotina, Turborotalita,
Daughter taxa (blue => in age window 0-300Ma)
Test small, lobulate test, with umbilically directed ultimate chamber, and the ruber-type cancellate wall texture.
More lobate than T. carcoselleensis and wall texture better developed.
Test small, slightly lobulate, with umbilically directed ultimate chamber, and ruber-type cancellate wall texture.
Specimens which cannot be assigned to established species

Taxonomy

Citation: Turborotalita Blow and Banner, 1962
Rank: Genus
Type species: Truncatulina humilis Brady, 1884
Taxonomic discussion: Turborotalita has previously been recorded only from the Neogene.
[Olsson et al. 2006]

Catalog entries: Turborotalita;

Type images:

Distinguishing features: Test very low trochospiral, lobulate, with 4½-7 moderately inflating, globular chambers in ultimate whorl. Ultimate chamber may be directed over and partially cover the umbilicus. Aperture interiomarginal, umbilical to extraumbilical, a wide arch bordered by an imperforate rim or with a narrow thickened lip. In the terminal growth stage an ampullate final chamber with infralaminal apertures may develop. Umbilicus small, often covered by the ultimate chamber. Wall spinose, a ruber-type reticulated wall, short spine collars support spines. A calcite crust often develops in the terminal stage.

NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.

Description


Diagnostic characters: Test very low trochospiral, lobulate, with 4½-7 moderately inflating, globular chambers in ultimate whorl. Ultimate chamber may be directed over and partially cover the umbilicus. Aperture interiomarginal, umbilical to extraumbilical, a wide arch bordered by an imperforate rim or with a narrow thickened lip. In the terminal growth stage an ampullate final chamber with infralaminal apertures may develop. Umbilicus small, often covered by the ultimate chamber. Wall spinose, a ruber-type reticulated wall, short spine collars support spines. A calcite crust often develops in the terminal stage.
[Olsson et al. 2006]

Biogeography and Palaeobiology


Phylogenetic relations: The origin of Turborotalita is uncertain. Morphologically it appears closest to Globoturborotalita in the arrangement of chambers around a small umbilicus and in the umbilical aperture. In addition, species of Globoturborotalita are small in size, as is Turborotalita. Globoturborotalita bassriverensis n. sp. is a possible ancestor.
[Olsson et al. 2006]

Most likely ancestor: Globoturborotalita - at confidence level 0 (out of 5). Data source: .

Biostratigraphic distribution

Geological Range:
Notes: Middle Eocene to Recent.
[Olsson et al. 2006]
Last occurrence (top): at top of Priabonian Stage (100% up, 33.9Ma, in Priabonian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Lutetian Stage (60% up, 43.8Ma, 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 - Atlas of Eocene Planktonic Foraminifera, chapter 6, p. 163

References:

Blow, W.H. & Banner, F.T., (1962). The mid-Tertiary (Upper Eocene to Aquitanian) Globigerinaceae. In: Eames, F.E. et al. (Editors), Fundamentals of mid-Tertiary Stratigraphical Correlation. Cambridge University Press, Cambridge, pp. 61-151.

Brady, H.B., (1884). Report on the Foraminifera dredged by H.M.S. Challenger, during the years 1873-1876. Rep. Sci. Results H.M.S. Challenger 1873-6, 9 (Zoology): 1-814.

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. et al. (Editors), Atlas of Eocene Planktonic Foraminifera, Cushman Foundation Special Publication 41. Allen Press, Lawrence, Kansas, pp. 111-168.


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Turborotalita compiled by the pforams@mikrotax project team viewed: 25-6-2018

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