pforams@mikrotax - Globoturborotalita eolabiacrassata

Citation: Globoturborotalita eolabiacrassata Spezzaferri and Coxall, in Spezzaferri et al. 2018

Synonyms:

Globigerina officinalis Subbotina.—Hooyberghs and De Meuter, 1972:21, pl. 5, fig. 4a [‘upper Oligocene’, Houthalan Sands, Belgium]. [Not Subbotina, 1953.]
Globigerina senilis Bandy.—Quilty, 1976:639, pl. 4, figs. 7, 8 [lower Oligocene Zone P18, DSDP Site 321, Nazca Plate, southeast Pacific Ocean]. [Not Bandy, 1949.]
Globoturborotalita labiacrassata (Jenkins).—Huber, 1991:pl. 5, fig. 16 [lower Oligocene, Zone AP14, ODP Site 744A, Kerguelen Plateau, southern Indian Ocean]. [Not Jenkins, 1966.]
Zeaglobigerina labiacrassata (Jenkins).—Spezzaferri, 1994:33, pl. 4, figs.1a-c [lower Miocene, Subzone N4b, ODP Site 667A, equatorial Atlantic Ocean]. [Not Jenkins, 1965.]
Globoturborotalita bassriverensis Olsson and Hemleben, 2006:117, pl. 6.3, fig. 16 [middle Eocene Zone E8, TDP Site 2, Kilwa, Tanzania], fig. 17 [middle Eocene Zone E9, TDP Site 2, Kilwa, Tanzania], fig. 18 [middle Eocene, ODP 150X, Island Beach Borehole, New Jersey], fig. 19 [lower-middle Eocene Zone E7, Tercis, Lesperon, France]. [Not Olsson and Hemleben, 2006.]
‘Globoturborotalita sp.—Sexton and others, 2006:6, pl. 1, fig. 6 [middle Eocene Zone E13, ODP Site 1052 Blake Nose, western North Atlantic Ocean].
Globigerina lentiana Rögl.—Székely and Filipescu, 2016:490, pl. 2, figs. 3a-b [lower Oligocene, Rupelian, Transylvanian Basin, Romania]. [Not Rӧgl, 1969.]

Taxonomic discussion:

A similar form identified as Globigerina cf. G. labiacrassata was identified at ODP Hole 1137A up to the upper Oligocene (Shipboard Scientific Party, 2000). This form probably corresponds to G. eolabiacrassata n. sp. The specimens identified as ‘Z. labiacrassata’ by Spezzaferri (1994) at DSDP Holes 667A (Subzone M1b) and 588C (Zone M5) can be attributed to G. eolabiacrassata n. sp.[Spezzaferri et al. 2018]

Distinguishing features:
Parent taxon (Globoturborotalita): Trochospiral test with a single, large, open umbilical aperture. Cancellate wall. 4-4½ chambers in final whorl
This taxon: Like G. bassriverensis but with more compact form and a thickened apertural rim.

Description

Low trochospiral, compact, consisting of 2½-3 whorls, slightly lobulate in profile outline. Both in spiral and umbilical views 4 subglobular chambers in the last whorl, increasing gradually in size. The last chamber is generally smaller than the previous ones, or it is equidimensional with the penultimate. The early whorl may not be visible because of calcite overgrowth in the figured specimens. The sutures are depressed and straight on both sides; umbilicus open but small, the single aperture is an umbilical, symmetrical or slightly asymmetrical, low rounded arch, bordered by a very thick rim. [Spezzaferri et al. 2018]

Normal perforate, cancellate, spinose, ruber/sacculifer-type wall texture. Pore concentration between 12-14 pores/50 μm2 test surface area.

Maximum diameter of the holotype is 0.15 mm. [Spezzaferri et al. 2018]

Biogeography and Palaeobiology

This species is very frequent in the South Indian Ocean, Kerguelen Plateau, but it has been observed also in the tropical Indian Ocean and the equatorial Atlantic Ocean. [Spezzaferri et al. 2018]

No data available. [Spezzaferri et al. 2018]

Globoturborotalita eolabiacrassata evolved from G. bassriverensis (Olsson and others, 2006). It gave rise to G. labiacrassata in the lower Oligocene close to the boundary between Zones O1/O2. [Spezzaferri et al. 2018]

Biostratigraphic distribution

Geological Range:
Notes: It appears in Eocene Zone E7 (Olsson and others 2006, pl. 6.3, fig. 19). We have observed it ranging up to Miocene Zone M5 in Hole 588C, Pacific Ocean (Spezzaferri, 1994). [Spezzaferri et al. 2018]
Last occurrence (top): within M5 zone (15.1-16.38Ma, top in Langhian stage). Data source: Spezzaferri et al. 2018
First occurrence (base): within E7 zone (45.72-50.2Ma, base in Ypresian stage). Data source: Olsson et al. 2006

Primary source for this page: Spezzaferri et al. 2018 - Olig Atlas chap.8 p.242

References:

Bandy, O. L. (1949). Eocene and Oligocene foraminifera from Little Stave Creek, Clarke County, Alabama. Bulletins of American Paleontology. 32(131): 1-210. gs

Hooyberghs, H. J. F. & de Meuter, F. (1972). Biostratigraphy and inter-regional correlation of the Miocene deposits of Northern Belgium based on planktonic foraminifera; the Oligocene-Miocene boundary on the southern edge of the North Sea basin, Brussels. Koninklijke Vlaamse Academie voor Wetenschappen, Letteren en Schone Kunsten van België. -. gs

Huber, B. T. (1991c). Paleogene and Early Neogene Planktonic Foraminifer Biostratigraphy of Sites 738 and 744, Kerguelen Plateau (Southern Indian Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 119: 427-449. gs

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). 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 16): 461-508. gs O

Jenkins, D. G. (1966b). Planktonic foraminiferal zones and new taxa from the Danian to lower Miocene of New Zealand. New Zealand Journal of Geology and Geophysics. 8 [1965](6): 1088-1126. gs

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 O

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

Olsson, R. K., Pearson, P. N. & Huber, B. T. (2006c). Taxonomy, biostratigraphy, and phylogeny of Eocene Catapsydrax, Globorotaloides, Guembelitrioides, Paragloborotalia, Parasubbotina, and Pseudoglobigerinella n. gen. 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 5): 67-110. gs O

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. gs O

Quilty, P. G. (1976). Planktonic foraminifera DSDP Leg 34, Nazca Plate. Initial Reports of the Deep Sea Drilling Project. 34: 629-703. gs O

Rögl, F. (1969a). Die Foraminiferenfauna aus den Phosphoritsanden von Plesching bei Linz (Oberosterreich) - Ottnangien (Untermiozan). Sonderdruck aus Mitteilungen der Geologischen Gessellschaft in Wien. 213-234. gs

Sexton, P. E., Wilson, P. A. & Pearson, P. N. (2006). Palaeoecology of late middle Eocene planktic foraminifera and evolutionary implications. Marine Micropaleontology. 60: 1-16. gs

Spezzaferri, S. (1994). Planktonic foraminiferal biostratigraphy and taxonomy of the Oligocene and lower Miocene in the oceanic record. An overview. Palaeontographia Italica. 81: 1-187. gs

Spezzaferri, S., Olsson, R. K., Hemleben, C., Wade, B. S. & Coxall, H. K. (2018d). 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

Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs

Szekely, S. -F. & Filipescu, S. (2016). Biostratigraphy and paleoenvironments of the Late Oligocene in the north-western Transylvanian Basin revealed by the foraminifera assemblages. Palaeogeography Palaeoclimatology Palaeoecology. 449: 484-509. gs

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Equally biconvex	aperture:	Umbilical
sp chamber shape:	Globular	coiling axis:	Low	periphery:	N/A	aperture border:	Thick lip
umb chbr shape:	Globular	umbilicus:	Wide	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Weakly depressed	umb depth:	Deep	wall texture:	Cancellate	shell porosity:	Macroperforate: >2.5µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	4-4	N.B. These characters are used for advanced search. N/A - not applicable

Globoturborotalita eolabiacrassata

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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