CATALOG OF ORIGINAL DESCRIPTIONS: Globoturborotalita bassriverensis Olsson & Hemleben 2006

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globoturborotalita -> Globoturborotalita bassriverensis
Other pages this level: G. barbula, G. bassriverensis, G. decorata, G. eolabiacrassata, G. paracancellata, G. pseudopraebulloides,

Globoturborotalita bassriverensis

Citation: Globoturborotalita bassriverensis Olsson & Hemleben 2006
Rank: Species
Type locality: New Jersey, USA
Type age: Zone E1
Type sample and level: Bass River Borehole, New Jersey, ODP 174AX, 1150.0- 1169.2 feet
Holotype Repository: Washington; USNM
Type & figured specimens: PLATE 6.3, FIGURES 1-19; Holotype (USNM 521867) and paratype (USNM 521868) deposited at the Smithsonian Museum of Natural History, Washington, D.C.

Linked specimens: USNM-521868 USNM-521867

Current identification/main database link: Globoturborotalita bassriverensis Olsson & Hemleben, in Olsson et al. 2006


Original Description
Type of wall: Cancellate, normal perforate, spinose, sacculifer-type wall structure.

Test morphology: Test moderately low trochospiral, globular, lobulate in outline, chambers globular; in spiral view 4 globular, slightly embracing chambers in ultimate whorl, increasing moderately in size, sutures depressed, straight, last 4 chambers make up about 1/2 of the test size; in umbilical view 4 globular, slightly embracing chambers, increasing moderately in size, sutures depressed, straight, umbilicus small, open, enclosed by surrounding chambers, aperture umbilical, a rounded arch, bordered by a narrow lip that is thickened in some specimens; in edge view chambers globular in shape, slightly embracing, initial spire of chambers slightly elevated.

Size: Maximum diameter of holotype 0.16 mm, thickness 0.12 mm.

Etymology: Named after the borehole at Bass River, New Jersey, from which the holotype is described.

Extra details from original publication
Diagnostic characters: The species is characterized by its small size, 4 globular, slightly embracing chambers in the final whorl, umbilical aperture, and cancellate wall texture. It is distinguished from G. ouachitaensis, which it most closely resembles, by its thicker, more prominent lip which it shares with its ancestral genus Subbotina.

Taxonomic discussion:
Globoturborotalita bassriverensis is described from an exceptionally well-preserved assemblage of planktonic foraminifera from a Zone E1 section in the Bass River Borehole, ODP 174AX, New Jersey Coastal Plain. The assemblage from which this species is described is associated with the carbon isotope excursion (CIE) and the Paleocene-Eocene Thermal Maximum (PETM). In addition, the excursion taxa (Kelly and others, 1996), Acarinina africana, A. sibaiyaensis, and Morozovella allisonensis also occur in this E1 assemblage. The bassriverensis morphology has not been observed in the Paleocene (Olsson and others, 1999). Thus, it appears that the origin of Globoturborotalita is related to climate-induced changes in the structure of water masses during the PETM. The genus was apparently derived from Subbotina because of its symmetrical sacculifer-type, spinose wall texture and umbilically directed aperture. Specimens are quite common but have probably been overlooked because of their small size.

Geographic distribution: Distributed in mid- to low latitudes.

Isotope paleobiology: Recorded (as ‘small globigeriniforms’) by Pearson and others (2001) from the middle Eocene of Tanzania with relatively negative ∂18O indicating a shallow water habitat.

Phylogenetic relations: Globoturborotalita bassriverensis is the first species in a generic line that extends to the Recent. The probable ancestor is Subbotina hornibrooki.

Geological Range: Zone E1 to Zone E10?

References:

Olsson, R. K. & Hemleben, C. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene Globanomalina, Planoglobanomalina n. gen and Pseudohastigerina. 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 14): 413-432. 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

Spezzaferri, S., Olsson, R. K., Hemleben, C., Wade, B. S. & Coxall, H. K. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Globoturborotalita. 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 8): 231-268. gs


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Globoturborotalita bassriverensis compiled by the pforams@mikrotax project team viewed: 19-11-2019

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