Orbulina universa d'Orbigny 1839
Orbulina universa d’Orbigny, 1839 Pl. 8, fig. 7 Orbulina universa d’Orbigny, 1839, pl. 28, fig. 2; LeRoy, 1948, p. 501, fig.1a; Kennett & Srinivasan, 1983, p. 86, pl. 20, fig. 4–6; Kender et al ., 2008, p. 522, pl. 28, fig. 2. Description : The test surface is spinose and covered with many perfo...
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Zenodo
2022
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5840605 https://zenodo.org/record/5840605 |
| Summary: | Orbulina universa d’Orbigny, 1839 Pl. 8, fig. 7 Orbulina universa d’Orbigny, 1839, pl. 28, fig. 2; LeRoy, 1948, p. 501, fig.1a; Kennett & Srinivasan, 1983, p. 86, pl. 20, fig. 4–6; Kender et al ., 2008, p. 522, pl. 28, fig. 2. Description : The test surface is spinose and covered with many perforations of different sizes across the entire test. The test is spherical, which may enclose an earlier globigerinid stage. There is no single large primary aperture. Remarks: The relative abundances of Orbulina universa form a minor component (<10%) of the planktic foraminiferal assemblage in core 2658. In the deeper cores (2670 and 2682), the relative abundances are mostly at <1% in the middle Miocene component of the cores. The tests are relatively small to moderate in size, measuring up to 0.5 mm in diameter. Global stratigraphic range: Orbulina universa is an extant species with its first appearance datum in the middle Miocene (Langhian) (Kennett & Srinivasan, 1983; Jones, 1994). Environmental preferences: This species is cosmopolitan and occurs widespread (BouDagher-Fadel, 2015), but has been documented to be more adapted to subtropical conditions, preferring warmer waters (Zachariasse et al ., 1997; Gallagher et al ., 2001; Kucera, 2007; Drinia et al ., 2008; Hemleben et al ., 1990). Regional occurrence: Orbulina universa is stratigraphically and spatially widespread along the southern and western margin of Africa. This species has been documented to occur in Miocene-aged strata of the Congo Basin (Kender, 2007) to the northern Namibian outer continental shelf, south of the Kunene River mouth (this study) and the southwestern shelf of South Africa (Compton et al., 2004). Wefer et al . (1998) reported the species to occur on the slope between central Namibia and offshore of the Orange River during the Pliocene and Pleistocene. : Published as part of Bergh, Eugene W. & Compton, John S., 2022, Taxonomy of Middle Miocene foraminifera from the northern Namibian continental shelf, pp. 1-55 in Zootaxa 5091 (1) on pages 35-36, DOI: 10.11646/zootaxa.5091.1.1, http://zenodo.org/record/5840434 : {"references": ["d'Orbigny, A. D. (1839) Foraminiferes. In: de la Sagra, R. (Ed.), Histoire physique, politique et naturelle de I'ile de Cuba. A. Bertrand, Paris, pp. 1 - 224.", "LeRoy, L. W. (1948) The foraminifer Orbulina universa d'Orbigny, a suggested Middle Tertiary time indicator. Journal of Paleontology, 22, 500 - 508.", "Kennett, J. P. & Srinivasan, M. S. (1983) Neogene Planktonic Foraminifera. A Phylogenetic Atlas. Hutchinson Ross, Stroudsburg, 265 pp.", "Kender, S., Kaminski, M. A. & Jones, R. W. (2008) Early to middle Miocene foraminifera from the deep-sea Congo Fan, offshore Angola. Micropalaeontology, 54, 477 - 568.", "Jones, R. W. (1994) The Challenger Foraminifera. Oxford University Press, Oxford, 149 pp.", "BouDagher-Fadel, M. K. (2015) Biostratigraphic and geological significance of planktonic foraminifera. UCL Press, London, 306 pp. https: // doi. org / 10.2307 / j. ctt 1 g 69 xwk", "Zachariasse, W. J., Jorissen, F. J., Perissoratis, C., Rohling, E. J. & Tsapralis, V. (1997) Late Quaternary foraminiferal changes and the nature of sapropel S 1 in Skopelos Basin. Proceedings of the 5 th Hellenic symposium on Oceanography and Fisheries, Kavalla, Greece, 1997, 391 - 394.", "Gallagher, S. J., Smith. A. J., Jonasson, K., Wallace, M. W., Holdgate, G. R., Daniels. J. & Taylor, D. (2001) The Miocene palaeoenvironmental and palaeoceanographic evolution of the Gippsland Basin, Southeast Australia: a record of Southern Ocean change. Palaeogeography, Palaeoclimatology, Palaeoecology, 172, 53 - 80. https: // doi. org / 10.1016 / S 0031 - 0182 (01) 00271 - 1", "Kucera, M. (2007) Planktonic foraminifera as tracers of past oceanic conditions. In: Hillaire-Marcel, C. & de Vernal, A. (Eds.), Proxies in Late Cenozoic Paleoceanography. Elsevier, Amsterdam, 213 - 262. https: // doi. org / 10.1016 / S 1572 - 5480 (07) 01011 - 1", "Drinia, H. A., Antonarakou, A. & Kontakiotis, G. (2008) On the occurrence of Early Pliocene marine deposits in the Ierapetra Basin, Eastern Crete, Greece. Bulletin of Geosciences, 83 (1), 63 - 78. https: // doi. org / 10.3140 / bull. geosci. 2008.01.063", "Hemleben, C., Spindler, M. & Anderson, O. R. (1990) Modern Planktonic Foraminifera. Springer Science and Business Media, New York, 386 pp. https: // doi. org / 10.1007 / 978 - 1 - 4612 - 3544 - 6", "Kender, S. (2007) Foraminiferal characterisation and taxonomy of Oligocene Miocene Congo Fan deep sea sub-environments, offshore Angola. Ph. D. thesis, University College, London, 325 pp.", "Compton, J. S., Wigley, R. & McMillan, I. K. (2004) Late Cenozoic phosphogenesis on the western shelf of South Africa in the vicinity of the Cape Canyon. Marine Geology, 206, 19 - 40. https: // doi. org / 10.1016 / j. margeo. 2004.02.004", "Wefer, G., Berger, W. H., Richter, C., Adams, D. D., Anderon, L. D., Andreasen, D. J., Bruchert, V., Cambray, H., Christensen, B. A., Frost, G. M., Giraudeau, J., Gorgas, T. J., Hermelin, O., Lange, C. B., Laser, B., Lin, H-L., Maslin, M., Meyers, P. A., Motoyama, I., Murray, R. W., Pato, D., Perez, M. E., Pufahl, P. K., Spiess, V., Vidal. L., Wigley, R. & Yamazaki, T. (1998) Proceedings of the Ocean Drilling Program, Initial Reports. Vol. 175. Ocean Drilling Program, College Station, Texas, 577 pp."]} |
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