pforams@mikrotax - Turborotalita praequinqueloba

pforams@mikrotax - Turborotalita praequinqueloba pforams@mikrotax - Turborotalita praequinqueloba

Turborotalita praequinqueloba

Classification: pf_cenozoic -> Globigerinidae -> Turborotalita -> Turborotalita praequinqueloba
Sister taxa: T. clarkei, T. humilis, T. quinqueloba ⟩⟨ T. praequinqueloba, T. carcoselleensis, T. sp.

Olig Atlas pl12-01 04-5.JPG
Eocene_Atlas_pl06-20_fig15-16-18-19.jpg
Olig Atlas pl12-01 06-7.JPG
Olig Atlas pl12-01 09-11.JPG
Eocene_Atlas_pl06-20_fig4-8-21.jpg
Eocene_Atlas_pl06-20_fig9-11-14.jpg
Olig Atlas pl12-01 13-15.JPG
Olig Atlas pl12-01 08.JPG
Olig Atlas pl12-01 16.JPG

Taxonomy

Citation: Turborotalita praequinqueloba Hemleben & Olsson, in Olsson et al 2006

Taxonomic rank: species

Basionym: Turborotalita praequinqueloba

Synonyms:

Turborotalita praequinqueloba Hemleben and Olsson in Olsson and others, 2006:165, pl. 6.20, figs. 1-21 [upper Eocene Zone E15/16, Shubuta Clay, Mississippi].

Taxonomic discussion:

This species has previously been identified only by Olsson and others (2006) from a single sample from Mississippi. Here we add occurrences from the Adriatic and Labrador Sea and extend the stratigraphic range into the Oligocene. [Pearson & Kucera 2018]

Catalog entries: Turborotalita praequinqueloba

Type images:

holotype: T. praequinqueloba
holotype: T. praequinqueloba
paratype: T. praequinqueloba

Distinguishing features:
Parent taxon (Turborotalita): Minute, with bullate extension of the final chamber, smooth wall, large pores and short conical spines concentrated along the periphery.
This taxon: Like T. carcoselleensis but more lobate and wall texture better developed.

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.
They are being edited as the site is developed and comments on them are especially welcome.

Description

Diagnostic characters:

Turborotalita praequinqueloba is distinguished from T. quinqueloba by possessing 4-4½ chambers in the final whorl. It is more gracile than T. carcoselleensis, which has more inflated chambers and a thicker test. [Pearson & Kucera 2018]

Morphology:

“Test very low trochospiral, lobulate in outline, chambers globular; in spiral view 4-4½ globular, slightly embracing chambers in ultimate whorl, increasing moderately in size, ultimate chamber sometimes reduced in size, sutures moderately depressed, straight; in umbilical view 4-4½ globular, slightly embracing chambers, increasing moderately in size, ampullate ultimate chamber often reduced and directed towards and over the umbilicus, sutures moderately depressed, straight, umbilicus small and often covered by ultimate chamber, aperture umbilical, a wide arch bordered by an imperforate rim or narrow thickened lip; in edge view chambers globular in shape, slightly embracing” (Olsson and others, 2006:165). [Pearson & Kucera 2018]

Wall type:

Normal perforate, spinose, may be covered by a crust in adult stage. [Pearson & Kucera 2018]

Size:

Maximum diameter of holotype: approximately 0.27 mm, thickness 0.13 mm (Olsson and others, 2006:165; note original scale bars are wrongly given as 100 µm instead of 40 µm on Olsson and others, 2006, pl. 6.20). [Pearson & Kucera 2018]

Character matrix
test outline: Lobate chamber arrangement: Trochospiral edge view: Inequally biconvex aperture: Umbilical
sp chamber shape: Globular coiling axis: Low periphery: N/A aperture border: Thin lip
umb chbr shape: Globular umbilicus: Narrow periph margin shape: Broadly rounded accessory apertures: None
spiral sutures: Moderately depressed umb depth: Shallow wall texture: Spinose shell porosity: Finely Perforate: 1-2.5µm
umbilical or test sutures: Moderately depressed final-whorl chambers: 4-4.5 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology

Geographic distribution

Probably global although so far only a few occurrences have been described. [Pearson & Kucera 2018]

Isotope paleobiology

No data available. [Pearson & Kucera 2018]

Phylogenetic relations

Probably evolved from T. quinqueloba by developing fewer chambers in the final whorl. [Pearson & Kucera 2018]

Most likely ancestor: Turborotalita quinqueloba - at confidence level 3 (out of 5). Data source: Pearson & Kucera 2018.

Biostratigraphic distribution

Geological Range:
Notes: Upper Eocene Zone E15/16 (Olsson and others, 2006) to upper Oligocene Zone O5 (this study). [Pearson & Kucera 2018]
Last occurrence (top): within O5 zone (26.93-28.09Ma, top in Chattian stage). Data source: Pearson & Kucera 2018
First occurrence (base): within E15 zone (34.68-35.89Ma, base in Priabonian stage). Data source: Olsson et al 2006

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Turborotalita

Primary source for this page: Pearson & Kucera 2018 - Olig Atlas chap.12 p.388; Olsson et al. 2006 - Eocene Atlas, chap. 6, p. 165

References:

Hemleben, C. & Olsson, R. K. (2006). Hemleben, C. & Olsson, R. K. (2006). Wall textures of Eocene planktonic foraminifera. 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 4): 47-66. 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 4): 47-66. gs O

Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006a). 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. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 6): 111-168. 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 O

Pearson, P. N. & Kucera, M. (2018). Pearson, P. N. & Kucera, M. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Turborotalita. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 12): 385-392. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 46(Chap 12): 385-392. gs

Turborotalita praequinqueloba compiled by the pforams@mikrotax project team viewed: 21-5-2025

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test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Inequally biconvex	aperture:	Umbilical
sp chamber shape:	Globular	coiling axis:	Low	periphery:	N/A	aperture border:	Thin lip
umb chbr shape:	Globular	umbilicus:	Narrow	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Moderately depressed	umb depth:	Shallow	wall texture:	Spinose	shell porosity:	Finely Perforate: 1-2.5µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	4-4.5	N.B. These characters are used for advanced search. N/A - not applicable