Globigerinoides sacculifer ( 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 : 246

Globigerinoides sacculifer ( Brady, 1877)

Figs 8G–I

Globigerina sacculifera: Brady 1877: 535 ; 1879: 287; 1884: 604, pl. 80, figs 11–17; pl. 81, fig. 2; pl. 82,

fig. 4; Banner & Blow 1960: 21, pl. 4, figs 1, 2.

Globigerinoides quadrilobatus sacculifer (Brady) : Parker 1962: 229, pl. 3, figs 6–10.

Globigerinoides sacculifer (Brady) : Todd 1965: 63–64, pl. 26, fig. 4; Parker 1967: 156–158, pl. 21, figs 1,

2, 4, text-fig. 5; Saito et al. 1981: 65–66, pl. 17, fig. 2; Basov & Krasheninnikov 1995: pl. V, figs 8,

9; Bylinskaya et al. 2002: 128, pl. IV, figs 1, 2.

Globigerinoides trilobus sacculifer (Brady) : Bolli & Saunders 1985: 196, figs 20.13.

Globigerinoides sacculiferus (Brady) : Loeblich & Tappan 1994: 107, pl. 205, figs 1–9.

Medium to large, low trochospiral test with 3 to 4 globular chambers in the final whorl. Chambers spherical to slightly flattened radially, very rapidly increasing, partly embracing. Final chamber usually incompletely inflated, having a sac-like appearance. Primary aperture interiomarginal, umbilical, a low but quite wide symmetrical arch; supplementary apertures elliptical or subtriangular.

Remarks: The species differs from G. trilobus in the characteristic sac-like shape of the last chamber and in being generally larger.

Distribution: A tropical species, it is an indicator of warm-water conditions. It appears in practically all our samples, in small numbers.

Figures

Fig. 8. (A, D) Globigerinoides conglobatus (Brady, 1879), sample C; (B, C) G. conglobatus, sample 22; (E, F) Globigerinoides trilobus (Reuss, 1850), sample 22; (G, H) Globigerinoides sacculifer (Brady, 1877), sample 22; (I) G. sacculifer, sample 22.