Turborotalia


Classification: pf_cenozoic -> Globanomalidae -> Turborotalia
Sister taxa: Globanomalina, Muricohedbergella, Planoglobanomalina, Pseudohastigerina, Turborotalia,
Daughter taxa: (blue => in age window 0-300Ma)
main lineage - arranged by FO
Like T. cocoaensis but more acute periphery to final chamber, and biconvex morphology.
Like T. cerroazulensis but final chamber has a distinctly acute periphery in edge view.
Like T. pomeroli but more conical in edge view, with flatter spiral side, generally lower trochospiral, & more compressed chambers.
Like T. frontosa but larger, with more compressed chamber morphology, and at least 4 chambers in the final whorl.
Like Subbotina but distinguished by pustulose wall texture, high arched aperture and slightly compressed final chamber. Also has a strong bias in coiling direction. Chambers more globular than in other Turborotalia species.
side branches - arranged by FO
Like T. increbescens but wider, more open umbilicus, more umbilically centered aperture and more globular chamber shape.
Like T. pomeroli but more compact morphology.
Like T. pomeroli but higher spire, dorso-ventrally extended chambers, usually more chambers in the final whorl, and more umbilically-centered aperture.
Like T. frontosa but flatter final chamber, giving test a quadrangular shape, also wall more finely perforate, & usually 3 chambers in the final whorl.
Specimens which cannot be assigned to established species

Taxonomy

Citation: Turborotalia Cushman and Bermúdez, 1949
Rank: Genus
Type species: Globorotalia centralis Cushman and Bermúdez, 1937 (=junior subjective synonym of Globigerina cerroazulensis Cole, 1928)
Synonyms:
Taxonomic discussion: Debates surrounding the origin of Turborotalia and the status of the type species Globorotalia centralis Cushman and Bermúdez are summarized in the introduction to this chapter, above.
[Pearson et al. 2006]

Catalog entries: Turborotalia;

Type images:

Distinguishing features: Trochospiral with umbilical-extraumbilical aperture.
Wall smooth pustulose, can be weakly cancellate, & may defoliate.

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: A wide range of test morphologies is included in the genus. Turborotalia is distinguished from other Eocene genera by the umbilical-extraumbilical aperture and smooth, pustulose wall, which is sometimes weakly cancellate, and has a tendency to defoliate in dissolved or recrystallized material.
[Pearson et al. 2006]

Wall type: Smooth and pustulose, sometimes weakly cancellate; normal size pores. [Pearson et al. 2006]

Test morphology: Trochospiral, varying from globular and inflated to strongly compressed and biconvex; flattened on spiral side; primary aperture umbilical-extraumbilical, usually a high arch with bordering lip; imperforate band or keel present in some species.
[Pearson et al. 2006]

Biogeography and Palaeobiology


Phylogenetic relations: The two species that survive into the Oligocene are quite similar and form a spectrum of morphology from the more ‘globigerinid’ T. ampliapertura to the more ‘globorotaliid’ T. increbescens. Of the two, T. ampliapertura is by far the most abundant (e.g., Leckie and others, 1993; Wade and Pearson, 2008). [Pearson et al. 2018]

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

Biostratigraphic distribution

Geological Range:
Notes: Lower Eocene to Oligocene. [Pearson et al. 2006]
Last occurrence (top): in upper part of Rupelian Stage (62% up, 30.3Ma, in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): at top of Ypresian Stage (95% up, 48.2Ma, in Ypresian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Pearson et al. 2006 - Eocene Atlas, chap. 15, p. 436

References:

Bermudez, P.J., (1937). Nuevas especies de Foraminiferos del Eoceno de las cercanias de Guanajay, provincia Pinar del Rio, Cuba. Memorias de la Sociedad Cubana de Historia Natural, 11(4): 237-248.

Bermudez, P.J., (1949). Tertiary smaller foraminifera of the Dominican Republic. Contributions from the Cushman Laboratory for Foraminiferal Research special publication, 25: 1-322.

Bykova, N.K.; Vasilenko, V.P.; Voloshinova, N.A.; Myatliuk, E.V. & Subbotina, N.N., (1959). Rotaliidae. In: Rauser-Chernoussova, D.M. and Fursenko, A.V. (Editors), Osnovyie Paleontologii Obsschaya chast, Prosteishie, Izdatel’stvo Akaemiya Nauk, Moskva. pp. 265-307.

Cole, W.S., (1928). A foraminiferal fauna from the Chapapote formation in Mexico. Bulletins of American Paleontology, 14(53): 1-32.

Cushman, J.A. & Bermudez, P.J., (1937). Further new species of foraminifera from the Eocene of Cuba. Contributions from the Cushman Laboratory for Foraminiferal Research, 13(1): 1-29.

Cushman, J.A. & Bermudez, P.J., (1949). Some Cuban species of Globorotalia. Contributions from the Cushman Laboratory for Foraminiferal Research, 25: 26-45.

Leckie, R.M.; Farnham, C. & Schmidt, M.G., (1993). Oligocene planktonic foraminifer biostratigraphy of Hole 803D (Ontong Java Plateau) and Hole 628A (Little Bahama Bank), and comparison with the southern high latitudes. In: Berger, W.H., Kroenke, L.W. and al., e. (Editors), Proceedings of the Ocean Drilling Program, Scientific Results. Ocean Drilling Program, College Station, Texas, pp. 113-136.

Pearson, P.N.; Premec-Fucek, V. & Premoli Silva, I., (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia. In: Pearson, P.N. et al. (Editors), Atlas of Eocene Planktonic Foraminifera. Cushman Foundation Special Publication. 41 Allen Press, Lawrence, Kansas, pp. 433-460.

Pearson, P.N.; Olsson, R.K.; Spezzaferri, S. & Leckie, R.M., (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Globanomalinidae (Turborotalia and Pseudohastigerina). In: Wade, B.S. et al. (Editors), Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research Special Pulbication. 46, pp. 403-415.

Rauzer-Chernousova, D.M. & Fursenko, A.V., (1959). Osnovy Paleontologii, Obshchaya chast’. ProteyshieAkademiya Nauk SSSR, Moscow, 482 pp.

Wade, B.S. & Pearson, P.N., (2008). Planktonic foraminiferal turnover, diversity fluctuations and geochemical signals across the Eocene/Oligocene boundary in Tanzania. Marine Micropaleontology, 68: 244-255.


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Turborotalia compiled by the pforams@mikrotax project team viewed: 15-12-2018

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