Globorotalia menardii ( Parker, Jones & Brady, 1865 )

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 : 234-236

Globorotalia menardii ( Parker, Jones & Brady, 1865)

Figs 3B, 3E

Rotalia menardii: Parker et al. 1865: 20 , pl. 3, fig. 81.

Pulvinulina menardii (Parker et al.) : Brady, 1884: 690, pl. 103, figs 1, 2.

Globorotalia menardii: Cushman 1927 b: 175 ; 1931: 91, pl. 17, fig. 1; Bé et al. 1966: 885–896, pls 1–17; Saito et al. 1981: 147, pl. 50, figs 1a–d; Loeblich & Tappan 1987: 475, pl. 516, figs 4–11; 1994: 101, pl. 183, figs 1–6; Basov & Krasheninnikov 1995: pl. I, figs 3, 4.

Globorotalia menardii menardii (Parker et al.) : Bolli & Saunders 1985: 226, figs 32.4, 34.5–7.

Medium to large biconvex trochospiral test with 5–6 wedge-shaped chambers in the final whorl. On spiral side chambers semi-circular, nearly flat, with curved sutures; on umbilical side triangular, slightly inflated, with radial sutures. Peripheral keel wide. Aperture interiomarginal, umbilical, a low arch with a large plate-like umbilical tooth. Remarks: G. menardii differs from G. cultrata in being generally larger and in having a robust, thicker test wall with a wider peripheral keel. It differs from G. tumida in having a more circular equatorial outline and a larger diameter, and in being narrower.

Distribution: Equatorial to tropical waters. Only four specimens were 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.