Globorotalia tumida ( Brady, 1877 )

Ovechkina, Maria N., Bylinskaya, Marina E. & Uken, Ron, 2010, Planktonic foraminiferal assemblage in surface sediments from the Thukela Shelf, South Africa, African Invertebrates 51 (2), pp. 231-231 : 236

Globorotalia tumida ( Brady, 1877)

Figs 3G, 3H

Pulvinulina menardii (d’Orbigny) var. tumida: Brady 1877: 535 ; Banner & Blow 1960: 26–27, pl. 5, fig. 1. Pulvinulina tumida Brady : Brady 1884: 692, pl. 103, figs 4–6.

Globorotalia tumida (Brady) : Cushman 1927 a: 91, pl. 19, fig. 12; Bolli et al. 1957: 41–42, pl. 10, figs 2a–c;

Parker 1962: 239–240, pl. 6, figs 8–10; Todd 1965: 71–72, pl. 28, fig. 1; Saito et al. 1981: 148, pl. 50,

figs 2a–d; Loeblich & Tappan 1987: 475, pl. 515, figs 4–6; 1994: 101, pl. 183, figs 7–12; Bylinskaya et al. 2002: 137, pl. IX, figs 13, 14.

Globorotalia tumida tumida (Brady) : Bolli & Saunders 1985: 227, figs 33.8, 34.11–13; Basov & Krasheninnikov 1995: pl. I, figs 8, 9.

Medium to large; biconvex trochospiral test with 5–6 wedge-shaped chambers in the final whorl. On the spiral side chambers reniform, slightly inflated, sutures curving, thickened; on the umbilical side chambers subtriangular, more inflated, with radial sutures. Peripheral keel distinct, thick.Aperture interiomarginal, extraumbilical, a low arch with a large, plate-like lip.

Remarks: G. tumida has a more elongate and thick test than G. menardii , with a less lobulate periphery and an angular final chamber.

Distribution: An equatorial/tropical species, appearing in warm-water regions only. A single specimen was found in our material.

Figures

Fig. 3. (A, D) Globorotalia cultrata (d’Orbigny, 1839), sample 25; (B, E) Globorotalia menardii (Parker, Jones & Brady, 1865), sample 30; (C, F) Globorotalia ungulata Bermúdez, 1961, sample 25; (G, H) Globorotalia tumida (Brady, 1877), sample 26; (I) Globorotalia ungulata Bermúdez, 1961, sample 30.