Turborotalita

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Globigerinidae -> Turborotalita
Sister taxa: Beella, Globigerina, Globigerinella, Protentella, Globigerinoides, Globigerinoidesella, Globoturborotalita, Orbulina, Praeorbulina, Sphaeroidinella, Sphaeroidinellopsis, Trilobatus, Turborotalita, Catapsydrax, Clavatorella, Paragloborotalia, Orcadia,

Distinguishing features: Minute, with bullate extension of the final chamber, smooth microperforate wall, large pores and short conical spines concentrated along the periphery

Daughter taxa (blue => in age window 0-300Ma)
Five chambers & small, compact outline
radially elongate chambers in the final whorl
Six or more chambers
Five chambers & apertural flap
Specimens which cannot be assigned to established species

Taxonomy

Citation: Turborotalita (Blow & Banner 1962)
Rank: genus
Type species: Truncatulina humilis Brady 1884
Taxonomic discussion:

Blow and Banner (1962) proposed the genus Turborotalita for a group of minute, Neogene globorotaliids characterized by bullate extension of the final chamber. Fleisher (1974) pointed out that a more satisfactory basis for diagnosis of this genus (other than minute size) is the nature of the surface ultrastructure: smooth microperforate wall (PI. 41, Fig. 2) and large pores and short conical spines concentrated along the periphery (PI. 41, Figs. 1,4,7).

Catalog entries: Turborotalita;

Type images:

Distinguishing features: Minute, with bullate extension of the final chamber, smooth microperforate wall, large pores and short conical spines concentrated along the periphery

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

Biogeography and Palaeobiology


Phylogenetic relations: Turborotalita is a late Neogene genus (Text Fig. 18) whose ancestry is uncertain; however, features such as the minute size of the test and the surface ultrastructure suggest a possible phylogenetic relationship with Tenuitella. [Kennett & Srinvasan 1983]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): in upper part of Aquitanian Stage (74% up, 21.1Ma, in Aquitanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Kennett & Srinivasan 1983, p.167

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.

Fleisher, R.L., (1974). Preliminary report on Late Neogene Red Sea foraminifera, Deep Sea Drilling Project, Leg 23B. Initial Reports of the Deep Sea Drilling Project, 26: 985-1011.

Fleisher, R.L., (1974). Cenozoic planktonic foraminifera and biostratigraphy, Arabian Sea, Deep Sea Drilling Project, Leg 23A. Initial Reports of the Deep Sea Drilling Project, 23: 1001-1072.

Kennett, J.P. & Srinivasan, M.S., (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania, 1-265 pp.


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

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