Turborotalita carcoselleensis


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

Taxonomy

Citation: Turborotalita carcoselleensis (Toumarkine & Bolli 1975)
Rank: Species
Basionym: Globorotaloides carcoselleensis
Synonyms:
Taxonomic discussion: There has been considerable confusion regarding the identification of Globigerina wilsoni Cole. Toumarkine and Luterbacher (1985) reillustrated the line drawing of the holotype of Globigerina wilsoni along with three SEM images they identified as that species from the type Guayabal Formation, from where G. wilsoni was described. New SEM images of the holotype of G. wilsoni (Pl.6.19, Figs. 15-17), although poorly preserved, show that it differs from the hypotypes illustrated by Toumarkine and Luterbacher in that the ultimate chamber is more flattened and extends towards and over the umbilicus. In this respect, the holotype appears much more like Turborotalia carcoselleensis (Toumarkine and Bolli) ( =Turborotalita carcoselleensis), which is common in the Guayabal Formation. However, the poor state of preservation does not allow an accurate identification, and we place wilsoni in questionable prior synonymy with carcoselleensis. The hypotypes of wilsoni illustrated by Toumarkine and Luterbacher are placed in Parasubbotina pseudowilsoni n. sp. (see discussion under this species in chapter 5). Turborotalita carcoselleensis differs from P. pseudowilsoni n. sp., which is described from the Guayabal Formation, in the more moderate increase in chamber size and the distinctive ultimate chamber that extends as a narrow, reduced chamber over the umbilicus. [Olsson et al. 2006]

Catalog entries: Globorotaloides carcoselleensis

Type images:

Distinguishing features: Test small, slightly lobate, with umbilically directed ultimate chamber, and ruber-type cancellate wall texture.

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 carcoselleensis is characterized by its small, slightly lobulate test, the umbilically directed ultimate chamber, and the ruber-type cancellate wall texture. [Olsson et al. 2006]

Wall type: Normal perforate, spinose, ruber-type, cancellate wall structure, covered by a crust in adult stage.

Test morphology: Test low trochospiral, slightly lobulate in outline, chambers globular; in spiral view 4.5-5 globular, slightly embracing chambers in ultimate whorl, increasing moderately in size, ultimate chamber often reduced in size, sutures moderately depressed, straight; in umbilical view 4.5-5 globular, slightly embracing chambers, increasing moderately in size, 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 et al. 2006]

Size: Maximum diameter of holotype 0.27 mm, maximum width of thickness 0.19 mm. [Olsson et al. 2006]

Character matrix

test outline:Lobatechamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical
sp chamber shape:Globularcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Globularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Strongly depressedumb depth:Deepwall texture:Spinoseshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:4.5-5.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Widespread in low to middle latitudes. [Olsson et al. 2006]
Aze et al. 2011 summary: Low to middle latitudes; based on Olsson et al. (2006a)

Isotope paleobiology: No data available. [Olsson et al. 2006]
Aze et al. 2011 ecogroup 2 - Open ocean mixed-layer tropical/subtropical, without symbionts. Based on δ13C lighter than species with symbionts; also with relatively light δ18O. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations: The origin of Turborotalita carcoselleensis 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 bassriverensis - at confidence level 2 (out of 5). Data source: Olsson eta l. 2006 f6.1.
Likely descendants: Turborotalita quinqueloba;

Biostratigraphic distribution

Geological Range:
Notes: Toumarkine and Luterbacher (1985) show a range for “Globorotaloidescarcoselleensis from the base of Zone P11 to the upper Eocene in the Possagno section of northern Italy. [Olsson et al. 2006]
Last occurrence (top): within E14 zone (35.89-37.99Ma, top in Priabonian stage). Data source: Eocene Atlas
First occurrence (base): within E9 zone (43.23-43.85Ma, base in Lutetian stage). Data source: Eocene Atlas

Plot of occurrence data:

Primary source for this page: Olsson et al. 2006 - Eocene Atlas, chap. 6, p. 163

References:

Cole, W. S. (1927). A foraminiferal fauna from the Guayabal formation in Mexico. Bulletins of American Paleontology. 14(51): 1-36. gs

Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006b). 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. gs

Poore, R. Z. & Brabb, E. E. (1977). Eocene and Oligocene planktonic foraminifera from the Upper Butano sandstone and type San Lorenzo formation, Santa Cruz Mountains, California. Journal of Foraminiferal Research. 7(4): 249-272. gs

Poore, R. Z. & Bybell, L. M. (1988). Eocene to Miocene biostratigraphy of New Jersey Core ACGS #4: Implications for regional stratigraphy. U.S. Geological Survey Bulletin. 1829: 1-41. gs

Toumarkine, M. & Bolli, H. M. (1975). Foraminifères planktoniques de l'Eocène moyen et supérieur de la coupe de Possagno. Schweizerische Palaontologische Abhandlungen. 97: 69-185. gs

Toumarkine, M. & Luterbacher, H. (1985). Paleocene and Eocene planktic foraminifera. In, Bolli, H. M. , Saunders, J. B. & Perch-Neilsen, K. (eds) Plankton Stratigraphy. Cambridge Univ. Press, Cambridge 87-154. gs

Toumarkine, M. (1975). Middle and Late Eocene planktonic foraminifera from the northwestern Pacific Ocean: Leg 32 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 32: 735-751. gs

Toumarkine, M. (1978). Planktonic foraminiferal biostratigraphy of the Paleogene of Sites 360 to 364 and the Neogene of Sites 362A, 363 and 364 Leg 40,. Initial Reports of the Deep Sea Drilling Project. 40: 679-721. gs


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Turborotalita carcoselleensis compiled by the pforams@mikrotax project team viewed: 20-11-2019

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