Globocassidulina subglobosa
Creators
- 1. Marine Research Institute and Department of Geological Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa. & Department of Environmental and Geographical Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa; & Invertebrate palaeontology and Geology, Iziko South African Museum, P. O. Box 61, Cape Town 8000, South Africa. john. compton @ uct. ac. za; https: // orcid. org / 0000 - 0002 - 0765 - 4141
- 2. Marine Research Institute and Department of Geological Sciences, University of Cape Town, Private Bag X 3, Rondebosch, 7701, South Africa.
Description
Globocassidulina subglobosa (Brady, 1881) Pl. 4, figs. 9–10
Cassidulina subglobosa Brady, 1881, p. 60; Brady, 1884, p. 430, pl. 54, fig. 17; Barker, 1960, pl. 54, fig. 17.
Globocassidulina subglobosa LeRoy & Levinson, 1974, p. 14, pl. 7, fig. 8; Tjalsma & Lohmann, 1983, p. 31, pl. 16, fig. 9; Lowry, 1987, p. 239, pl. 14, figs. 7a–c; Miller & Katz, 1987, p. 134, pl. 3, fig. 4; Hermelin, 1989, p. 74; Thomas, 1990, p. 590; Jones, 1994, p. 60, pl. 54, fig. 17; Robertson, 1998, p. 136, pl. 53, figs. 1–2; Kuhnt et al., 2002, p. 144, pl. 10, figs. 3–5; pl. 17, figs. 1–2; Kender et al., 2008, p. 512, pl. 17, fig. 1–2; Milker & Schmiedl, 2012, p. 85, figs. 20.13–20.14; Holbourn et al., 2013, p. 264.
Description: The test wall is calcareous and smooth. The test is small, subglobular and subcircular in cross-section. The chambers have a biserial arrangement, are inflated and globular in shape, separated by depressed sutures. The aperture is slit-like, situated interio-marginal and stretches along the margin of the terminal chamber.
Remarks: Specimens from this species comprise a trace component (<1%) in core 2658, a minor component (<5%) in core 2682 and major component (<40%) in core 2670. The tests from this study are smaller than those in LeRoy & Levinson (1974) (diameter of up to 0.75 mm), measuring 0.25 mm in diameter.
Life strategy: This species is epifaunal to shallow-infaunal (Kaiho, 1994; Vilela, 1995), generally unattached and prefers muddy sediments under oxic (Kaiho, 1994) to suboxic (De & Gupta, 2010) conditions. Schmiedl et al. (1997) recorded G. subglobosa in oligotrophic areas, under vigorous bottom currents and sandy substrates. Panieri & Gupta (2008) recorded this species in relatively high abundances in muddy substrates. The bathymetric range of G. subglobosa is broad, stretching from the middle shelf to abyssal depths (Murgese & de Deckker, 2005; Holbourn et al., 2013).
Global stratigraphic range: Globocassidulina subglobosa occurs from the Palaeocene to Recent (Holbourn et al., 2013).
Regional occurrence: This species is recorded in Miocene-aged strata from the Congo Basin (Kender et al., 2008) and the Namibian outer continental shelf, south of the Kunene River mouth (this study). Hay et al. (1984) and Wefer et al. (1998) reported the occurrence of Globocassidulina subglobosa in late Miocene to Pleistoceneaged sediments along the continental slope in relatively minor abundances (<10%) at most sites. Lowry (1987) recorded occurrences of G. subglobosa in surface sediments on the continental shelf, between Cape Town and Port Elizabeth.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Cassidulinidae
- Genus
- Globocassidulina
- Kingdom
- Chromista
- Order
- Rotaliida
- Phylum
- Foraminifera
- Scientific name authorship
- Brady
- Species
- subglobosa
- Taxon rank
- species
- Taxonomic concept label
- Globocassidulina subglobosa (Brady, 1881) sec. Bergh & Compton, 2022
References
- Brady, H. B. (1881) Notes on some of the reticularian Rhizopoda of the Challenger Expedition, Part III. Quarterly Journal of Microscopical Science, 21, 31 - 71. https: // doi. org / 10.1242 / jcs. s 2 - 21.81.31
- Brady, H. B. (1884) Report of the foraminifera dredged by H. M. S. Challenger during the years 1873 - 1876. Zoology, 9, 1 - 814.
- Barker, R. W. (1960) Taxonomic notes on the species figured by H. B. Brady in his report on the Foraminifera dredged by H. M. S. Challenger during the years 1873 - 1876. Society of Economic Palaeontologists and Mineralogists, Special Publication, 9, 1 - 238.
- LeRoy, D. O. & Levinson, S. A. (1974) A deep-water Pleistocene microfossil assemblage from a well in the Northern Gulf of Mexico. Micropalaeontology, 20 (1), 1 - 37. https: // doi. org / 10.2307 / 1485098
- Tjalsma, R. C. & Lohmann, G. P. (1983) Paleocene-Eocene bathyal and abyssal foraminifera from the Atlantic Ocean. Micropalaeontology, Special Publication, 4, 1 - 90.
- Lowry, F. M. D. (1987) Foraminiferal thanatocoenoses from the continental shelf of southern Africa. Unpublished Ph. D. thesis, University College, London, 443 pp.
- Miller, K. G. & Katz, M. E. (1987) Oligocene to Miocene benthic foraminiferal and abyssal circulation changes in the north Atlantic. Micropalaeontology, 33 (2), 97 - 149. https: // doi. org / 10.2307 / 1485489
- Hermelin, J. O. R. (1989) Pliocene benthic foraminifera from the Ontong-Java Plateau (Western Equatorial Pacific Ocean): faunal response to changing paleoenvironment. Cushman Foundation for Foraminiferal Research Special Publication, 26, 1 - 143.
- Thomas, E. (1990) Late Cretaceous through Neogene benthic foraminifers. In: Barker, P. E., Kennett, J. P., O'Connell, S., Berkowitz, S., Bryant, W. R., Burckle, L. H., Egeberg, P. K., Futterer, D. K., Gersonde, R. E., Golovchenko, X., Hamilton, N., Lazarus, D. B., Lawver, L., Lonsdale, M., Mohr, B., Nagao, T., Pereira, C. P. G., Pudsey, C. J., Robert, C. M., Schandl, E., Spiess, V., Stott, L. D., Thomas, E., Thompson, F. M. & Wise, S. W. (Eds.), Proceedings of the Ocean Drilling Program, Scientific Results. Vol. 113. Ocean Drilling Program, College Station, Texas, pp. 571 - 594. https: // doi. org / 10.2973 / odp. proc. sr. 113.123.1990
- Jones, R. W. (1994) The Challenger Foraminifera. Oxford University Press, Oxford, 149 pp.
- Robertson, B. E. (1998) Systematics and paleoecology of the benthic Foraminiferida from the Buff Bay section, Miocene of Jamaica. Micropaleontology, 44, 1 - 266. https: // doi. org / 10.2307 / 1486062
- Kuhnt, W., Holbourn, A. E. & Zhao, Q. (2002) The early history of the South China Sea: evolution of Oligocene-Miocene deep water environments. Revue de Micropaleontologie, 45, 99 - 159.
- 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.
- Milker, Y. & Schmiedl, G. (2012) A taxonomic guide to modern benthic shelf foraminifera of the western Mediterranean Sea. Palaeontologica Electronica, 15, 1 - 134. https: // doi. org / 10.26879 / 271
- Holbourn, A., Henderson, A. S. & MacLeod, N. (2013) Atlas of Benthic Foraminifera. Wiley-Blackwell, Oxford, 654 pp. https: // doi. org / 10.1002 / 9781118452493
- Kaiho, K. (1994) Benthic foraminiferal dissolved-oxygen index and dissolved-oxygen levels in the modern ocean. Geology, 22 (8), 719 - 722. https: // doi. org / 10.1130 / 0091 - 7613 (1994) 022 <0719: BFDOIA> 2.3. CO; 2
- Vilela, C. G. (1995) Ecology of Quaternary benthic foraminiferal assemblages on the Amazon shelf, northern Brazil. Geo-Marine Letters, 15 (3 - 4), 199 - 203. https: // doi. org / 10.1007 / BF 01204464
- De, S. & Gupta, A. K. (2010) Deep-sea faunal provinces and their inferred environments in the Indian Ocean based on distribution of Recent benthic foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology, 291 (3), 429 - 442. https: // doi. org / 10.1016 / j. palaeo. 2010.03.012
- Panieri, G. & Gupta, B. K. S. (2008) Benthic foraminifera of the Blake Ridge hydrate mound, western North Atlantic Ocean. Marine Micropaleontology, 66 (2), 91 - 102. https: // doi. org / 10.1016 / j. marmicro. 2007.08.002
- Murgese, D. S. & de Deckker, P. (2005) The distribution of deep-sea benthic foraminifera in core tops from the eastern Indian Ocean. Marine Micropaleontology, 56 (1), 25 - 49. https: // doi. org / 10.1016 / j. marmicro. 2005.03.005
- Hay, W. W., Sibuet, J. C., Barron, E. J., Brassell, S. C., Dean, W. E., Huc, A. Y., Keating, B. H., McNulty, C. L., Meyers, P. A., Nohara, M., Schallreuter, R. E. L., Steinmetz, J. C., Stow, D. A. V., Stradner, H., Boyce, R. E. & Amidei, R. (1984) Initial Reports of the Deep Sea Drilling Project. Vol. 75. United States Government Printing Office, Washington, D. C., 1303 pp. https: // doi. org / 10.2973 / dsdp. proc. 75.1984
- 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.