pforams@mikrotax - Chiloguembelina ototara

Citation: Chiloguembelina ototara (Finlay 1940)

Synonyms:

?Guembelina cubensis Palmer var. heterostoma Bermúdez, 1937:143, pl. 17, figs. 6-8 [upper Eocene, Camaguey Province, Cuba].
?Guembelina venezuelana Nuttall var. rugosa Parr, 1938:82, pl. 2, fig. 8a,b [upper Eocene, King’s Park, Perth, Australia].
Guembelina ototara Finlay, 1940:453, pl. 63, figs. 50-52 [Oamaru Diatomite, uppermost Eocene (Runangan Stage) South Island, New Zealand].
Chiloguembelina ototara (Finlay).—Hornibrook, 1990:pl. 1, figs. 12-16 [Oamaru Diatomite, uppermost Eocene (Runangan Stage), South Island, New Zealand].—Resig, 1993, pl. 1, fig. 9 [lower Oligocene Zone P18, ODP Hole 807C, Ontong Java Plateau, western Pacific Ocean].—Huber and others, 2006:474-475, pl. 16.3, figs. 13, 14 [paratype, USNM 689102; upper Eocene, Totaro limestone, Oamaru, New Zealand], figs. 15-18 [upper Eocene, Cape May Borehole, New Jersey, ODP 150X, 1485-1490 ft.], figs. 19, 21 [Zone AP11, ODP Hole 738B-8H-6, 90-95 cm, Kerguelen Plateau, southern Indian Ocean], fig. 20 [upper Eocene, ODP Hole 865B, Allison Guyot, equatorial Pacific Ocean], fig. 22 [Zone E8/9, Kilwa Masoko, Tanzania].—Miller and others, 2008: fig. 6E-G [lower Oligocene Zone O1, St. Stephens Quarry].—Malumian and others, 2009:318, pl. 1, fig. 7 a-d [upper Eocene, Cerro Colorado Fm, Tierra del Fuego, South America].—Firth and others, 2013: fig. 13c [Eocene-Oligocene transition interval, ODP Hole 647A, North Atlantic Ocean].
Guembelina multicellaris Hussey is considered synonymous with C. ototara based on SEM observation of the multicellaris holotype (Pl.16.3, Figs. 9, 10), which reveals an elongate test with inflated chambers, a low, interiomarginal aperture, and pustules rather than striae on the wall surface.
?Guembelina multicellaris Hussey, 1949:130, pl. 27: fig. 10 [Eocene, Louisiana, U.S.A.]
Chiloguembelina cubensis (Palmer).—Jenkins, 1971:66-67, pl. 1, figs. 3-5 [upper Eocene, Oamaru, South Island, New Zealand].—Jenkins and Srinivasan, 1986:807, pl. 1, fig. 2 [upper Eocene Globigerina linaperta Zone, DSDP Site 592, Lord Howe Rise, Pacific Ocean].—Huber, 1991:440, pl. 6, fig. 8 [lower Oligocene Zone AP13, ODP Hole 738B, Kerguelen Plateau, southern Indian Ocean]. [Not Palmer, 1934.]
Chiloguembelina gracillima (Andreae).—Cicha and others, 1998:90, pl. 30, figs. 3, 4 [Oligocene, Kiscellian, Menilitic Fm., Moutnice, Czech Republic].—Hamrsmid and Rögl, 2000:40, fig. 2 [lower Oligocene Zone P20, Zagros Mountains, Baba Heydar section, Iran]. [Not Andreae, 1884 = nomen dubium non conservandum.]

Taxonomic discussion:

Hornibrook (1990) was the first to draw attention to the significant difference in wall texture between topotypes of C. cubensis, which are striate, and topotypes of C. ototara, which have pustules that are randomly distributed on the test surface rather than striae. These differences are apparent in SEM images but they are difficult to discern under the light microscope. Guembelina cubensis Palmer var. heterostoma Bermúdez and Guembelina venezuelana Nuttall var. rugosa Parr may be prior synonyms but their wall textures are currently undetermined. [Huber et al. 2006]

Distinguishing features:
Parent taxon (Chiloguembelina): Test subtriangular in outline, biserial throughout or rarely with multiserial final chambers; aperture a simple arched opening at base of the final chamber, with a narrow rim on one margin and a broad collar or flange directed toward one of the flat sides of the test, lacking an infolded margin or internal plate. Rarely with multiple apertures.
This taxon: Test short to somewhat elongate, moderately to rapidly expanding, subtriangular, periphery rounded rather than compressed; usually 11-12, up to 15 chambers; sutures depressed, perpendicular to slightly oblique to growth axis; Aperture moderately narrow to broad symmetrical arch centered or slightly off-center, bordered on one side by a narrow lip.

Description

Distinguished from C. cubensis and C. adriatica by the absence of costae on the wall surface and the shorter, more strongly tapering test, and from C. andreae by the pustulose surface ornamentation and by a tendency for a larger aperture bordered on one side by a more distinct lip. [Premec Fucek et al. 2018]

Test biserial, elongate, moderately to rapidly expanding, subtriangular in outline with an apical angle of 50-55°; periphery rounded rather than compressed; chambers increasing moderately to rapidly in size, usually 11-12, and sometimes up to 15 in adult specimens; sutures depressed, perpendicular to slightly oblique to growth axis; aperture a moderately narrow to broad symmetrical arch centered or slightly off-center of the base of the final chamber, extending half-way up the final chamber face, bordered on one side by a narrow lip that thickens away from its attachment point on the chamber face; some specimens with an irregularly shaped terminal chamber. [Premec Fucek et al. 2018]

Microperforate, bilamellar, (ototara-type wall; see Chapter 15, this volume); uniformly finely pustulose, lacking pore mounds or costae. [Premec Fucek et al. 2018]

Paratype USNM 689102: length, 0.17 mm, width 0.10 mm, breadth 0.07 mm; hypotypes up to 0.23 mm. [Premec Fucek et al. 2018]

Biogeography and Palaeobiology

Cosmopolitan. [Premec Fucek et al. 2018]

On the basis of stable isotope data of C. ototara from Zone E14 in the northwest Atlantic Ocean (ODP 1052B), Sexton and others (2006) report that this species occupied a thermocline habitat. Stable isotope data obtained for the upper Eocene C. ototara (Barrera and Huber, 1991; identified as Chiloguembelina spp.) suggest that it lived near the surface mixed-layer at high southern latitudes. [Premec Fucek et al. 2018]

Probably descended from Chiloguembelina crinita during the early middle Eocene. [Premec Fucek et al. 2018]

Biostratigraphic distribution

Geological Range:
Notes: Middle Eocene Zone E9 (Huber and others, 2006) through lowermost part of Oligocene Zone O2 (this study). The lowest occurrence of this species is difficult to determine because of its morphologic similarity to its presumed ancestor, C. crinita. A lowermost Oligocene (Zone O1) extinction of this species was recorded in New Zealand (Hornibrook, 1990) and ODP Sites 806 and 807 on Ontong Java Plateau (Resig, 1993). Investigations in this work in Syria (Palmyride region) and north Adriatic Sea suggest its highest occurrence (HO) in the lowermost part of the Zone O2. [Premec Fucek et al. 2018]
Last occurrence (top): within O2 zone (30.28-32.10Ma, top in Rupelian stage). Data source: Premec Fucek et al. 2018
First occurrence (base): within E9 zone (43.23-43.85Ma, base in Lutetian stage). Data source: Huber et al. 2006, f16.2

Primary source for this page: Premec Fucek et al. 2018 - Olig Atlas chap.17 p.471; Huber et al. 2006 - Eocene Atlas, chap. 16, p. 474

References:

Andreae, A. (1884). Ein beitrag zur kenntniss des Elsasser Tertiars. In, Abhandlungen der Geol. Special - Karte Elsass - Lothringen. R. Schulz, Strassburg II(III): 1-239. gs

Barrera, E. & Huber, B. T. (1991). Paleogene and early Neogene oceanography of the southern Indian Ocean: Leg 119 foraminifer stable isotope results. Proceedings of the Ocean Drilling Program, Scientific Results. 119: 693-717. gs

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

Cicha, I., Rögl, F., Rupp, C. & Ctyroká, J. (1998). Oligocene-Miocene foraminifera of the central Paratethys. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft. 549: 1-325. gs

Finlay, H. J. (1940). New Zealand foraminifera: Key species in stratigraphy - no. 4. Transactions of the Royal Society of New Zealand. 69(4): 448-472. gs

Firth, J. V., Eldrett, J. S., Harding, I. C., Coxall, H. K. & Wade, B. S. (2013). Integrated biomagnetochronology for the Palaeogene of ODP Hole 647A: implications for correlating palaeoceanographic events from high to low latitudes, in Jovane, L., Herrero-Bervera, E., Hinnov, L.A., and Housen, B.A. (eds.), Magnetic Methods and the Timing of Geological Processes. Geological Society of London, Special Publications. 373: 29-78. gs

Hamrsmid, B. & Rögl, F. (2000). Biostratigraphy of the Baba Heydar section, Iran. Senckenbergiana Lethaea. 80: 39-44. gs

Hornibrook, N. d. B. (1990). Chiloguembelina cubensis (Palmer) and C. ototara (Finlay), in New Zealand. Journal of Foraminiferal Research. 20(4): 368-371. 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

Hussey, K. M. (1949). Louisiana Cane River Eocene foraminifera. Journal of Paleontology. 23: 109-144. gs

Jenkins, D. G. & Srinivasan, M. S. (1986). Cenozoic planktonic foraminifera from the equator to the sub-antarctic of the Southwest Pacific. Initial Reports of the Deep Sea Drilling Project. 90: 795-834. gs

Jenkins, D. G. (1971). New Zealand Cenozoic Planktonic Foraminifera. New Zealand Geological Survey, Paleontological Bulletin. 42: 1-278. gs

Malumian, N., Jannou, G. & Náñez, C. (2009). Serial planktonic foraminifera from the Paleogene of the Tierra del Fuego Island, South America. Journal of Foraminiferal Research. 39: 316-321. gs

Miller, K. G., et al. (2008). Eocene-Oligocene global climate and sea-level changes: St. Stephens Quarry, Alabama. Geological Society of America, Bulletin. 120: 34-53. gs

Palmer, D. K. (1934). The Foraminiferal Genus Guembelina in the Tertiary of Cuba. Memorias de la Sociedad Cubana de Historia Natural “Felipe Poey”. 8(2): 73-76. gs

Parr, W. J. (1938). Upper Eocene Foraminifera from Deep Borings in King's Park, Perth, Western Australia. Journal of the Royal Society of Western Australia. 24: 69-101. gs

Premec Fucek, V., Hernitz Kucenjak, M. & Huber, B. T. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Chiloguembelina and Jenkinsina. 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 17): 459-480. gs

Resig, J. M. (1993). Cenozoic stratigraphy and paleoceanography of biserial planktonic foraminifers, Ontong Java Plateau. Proceedings of the Ocean Drilling Program, Scientific Results. 130: 231-244. 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

test outline:	Triangular	chamber arrangement:	Biserial	edge view:	Equally biconvex	aperture:	Interiomarginal
sp chamber shape:	Globular	coiling axis:	N/A	periphery:	N/A	aperture border:	Thin lip
umb chbr shape:	Globular	umbilicus:	N/A	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Moderately depressed	umb depth:	N/A	wall texture:	Finely pustulose	shell porosity:	Microperforate: <1µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	2-2	N.B. These characters are used for advanced search. N/A - not applicable

Chiloguembelina ototara

Taxonomy

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

References:

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