Globocassidulina subglobosa

• Main Authors: Bergh, Eugene W., Compton, John S.
• Format: Text
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Chromista; Foraminifera; Globothalamea; Rotaliida; Cassidulinidae; Globocassidulina; Globocassidulina subglobosa; Pacific; Indian; Christensen; Bryant; Lowry; Buff; Perez; Macleod; Kennett; Vidal; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5840519; https://zenodo.org/record/5840519

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. : 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 page 22, DOI: 10.11646/zootaxa.5091.1.1, http://zenodo.org/record/5840434 : {"references": ["Brady, H. B. 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