Globigerinoides conglobatus (Brady, 1879)

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 : 245

Globigerinoides conglobatus (Brady, 1879)

Figs 8A–D

Globigerina conglobata: Brady 1879: 286 ; 1884: 603, pl. 80, figs 1–5; pl. 82, fig. 5; Banner & Blow 1960:

6, pl. 4, fig. 4.

Globigerinoides conglobatus (Brady) : Drooger 1953: 142; Parker 1962: 229, pl. 3, figs 1–5; Todd 1965: 62,

pl. 25, fig. 3; Pflaumann & Krasheninnikov 1978: 889, pl. 4, figs 4–6; Saito et al. 1981: 56, pl. 14, figs

1a–d; Cimerman & Langer 1991: 57, pl. 60, figs 6, 7; Bylinskaya et al. 2002: 127, pl. III, figs 4, 5. Alloglobigerinoides conglobatus (Brady) : Loeblich & Tappan 1994: 105, pl. 193, figs 5–10; pl. 194, figs 1–3. Test large, medium to high trochospire, subglobular or subquadrate in outline. In the final whorl there are about 3.5 subspherical chambers, rapidly increasing as added but greatly embracing. Primary aperture umbilical, interiomarginal, a long, low asymmetrical arch; secondary supplementary apertures smaller, arch-shaped openings on spiral side. Remarks: G. conglobatus has a larger and more compact test in adults, and more embracing chambers in juveniles, than does G. ruber .

Distribution: Equatorial to temperate waters. It appears in practically half of our samples, in low abundance.

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.