Daughter taxa (time control age-window is: 0-800Ma)
main lineage - arranged by FO
Turborotalia cunialensis Like T. cocoaensis but more acute periphery to final chamber, and biconvex morphology.
Turborotalia cocoaensis Like T. cerroazulensis but final chamber has a distinctly acute periphery in edge view.
Turborotalia cerroazulensis Like T. pomeroli but more conical in edge view, with flatter spiral side, generally lower trochospiral, & more compressed chambers.
Turborotalia pomeroli Like T. frontosa but larger, with more compressed chamber morphology, and at least 4 chambers in the final whorl.
Turborotalia frontosa 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
Turborotalia ampliapertura Like T. increbescens but wider, more open umbilicus, more umbilically centered aperture and more globular chamber shape.
Turborotalia altispiroides Like T. pomeroli but higher spire, dorso-ventrally extended chambers, usually more chambers in the final whorl, and more umbilically-centered aperture.
Turborotalia possagnoensis Like T. frontosa but flatter final chamber, giving test a quadrangular shape, also wall more finely perforate, & usually 3 chambers in the final whorl.
Turborotalia sp. Specimens which cannot be assigned to established species
Taxonomy
Citation: Turborotalia Cushman&Bermúdez, 1949taxonomic rank: GenusType species: Globorotaliacentralis Cushman and Bermúdez, 1937 (=junior subjective synonym of Globigerinacerroazulensis Cole, 1928)Synonyms:
Globorotalia (Turborotalia) Cushman and Bermúdez, 1949:42
Turborotalia Cushman and Bermúdez. —Bykova and others, in Rauzer-Chernousova and Fursenko, 1959 (nom. transl.)
Taxonomic discussion: Debates surrounding the origin of Turborotalia and the status of the type species Globorotaliacentralis Cushman and Bermúdez are summarized in the introduction to this chapter, above. [Pearson et al. 2006]
Distinguishing features: Parent taxon (Globanomalinidae): Hedbergellids - trochospiral, mostly low trochospiral. Apertures of earlier formed chambers remain visible around the umbilicus. This taxon: 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
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] Wall type: Smooth and pustulose, sometimes weakly cancellate; normal size pores. [Pearson et al. 2006]
Biogeography and Palaeobiology
Phylogenetic relationsThe 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): at top of O2 zone (100% up, 30.3Ma, in Rupelian stage). Data source: Total of ranges of the species in this database First occurrence (base): within E7b subzone (45.72-48.31Ma, base in Ypresian stage). Data source: Total of ranges of species in this database
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
Primary source for this page: Pearson et al. 2006 - Eocene Atlas, chap. 15, p. 436
References:
Bermudez, P. J. (1937b). Nuevas especies de Foraminiferos del Eoceno de Cuba. Memorias de la Sociedad Cubana de Historia Natural “Felipe Poey”. 11: 137-150. gs
Bermudez, P. J. (1949). Tertiary smaller foraminifera of the Dominican Republic. Cushman Laboratory for Foraminiferal Research, Special Publication. 25: 1-322. gs
Bykova, N. K., Vasilenko, V. P., Voloshinova, N. A., Myatliuk, E. V. & Subbotina, N. N. (1959). Rotaliidae. In, Rauser-Chernoussova, D. M. & Fursenko, A. V. (eds) Osnovyie Paleontologii. d: 265-307. gs
Cole, W. S. (1928). A foraminiferal fauna from the Chapapote formation in Mexico. Bulletins of American Paleontology. 14(53): 1-32. gs
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. gs
Cushman, J. A. & Bermudez, P. J. (1949). Some Cuban species of Globorotalia. Contributions from the Cushman Laboratory for Foraminiferal Research. 25: 26-45. gsO
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. Proceedings of the Ocean Drilling Program, Scientific Results. 130: 113-136. gs
Pearson, P. N., Premec-Fucek, V. & Premoli Silva, I. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Turborotalia. 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 15): 433-460. gsO
Pearson, P. N., Olsson, R. K., Spezzaferri, S. & Leckie, R. M. (2018a). Taxonomy, biostratigraphy, and phylogeny of Oligocene Globanomalinidae (Turborotalia and Pseudohastigerina). 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 14): 403-414. gs
Rauzer-Chernousova, D. M. & Fursenko, A. V. (1959). Osnovy Paleontologii, Obshchaya chast’. Proteyshie. Akademiya Nauk SSSR, Moscow. 1-482. gs
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. gs
Turborotalia compiled by the pforams@mikrotax project teamviewed: 14-12-2024
