Globorotalia inflata (d’Orbigny, 1839)

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

Globorotalia inflata (d’Orbigny, 1839)

Figs 4A–C

Globigerina inflata: d’Orbigny 1839 b: 134 , pl. 2, figs 7–9.

Turborotalia inflata (d’Orbigny) : Bermúdez 1961: 1323–1324, pl. 18, figs 2a–b.

Globorotalia inflata (d’Orbigny) : Parker 1962: 236, pl. 5, figs 6–9; Saito et al. 1981: 124, pl. 41, figs 1a–d;

Bylinskaya et al. 2002: 133, pl. XI, figs 1–3.

Test size variable, usually medium-sized, low trochospiral with 4 subglobular chambers in the final whorl. On umbilical side chambers more inflated than on spiral side, increasing moderately in size as added. Aperture interiomarginal, a high, wide arch.

Remarks: G. inflata differs from other Globorotalia species encountered in having subglobular chambers and in lacking a keel.

Distribution: This species characterizes cool-temperate waters. It is uncommon in the tropical region ( Bylinskaya et al. 2002) and very rare in our material.

Figures

Fig. 4. (A–C) Globorotalia inflata (d’Orbigny, 1839), sample 26; (D, G) Neogloboquadrina incompta, sample 15; (E, H) N.dutertrei (d’Orbigny, 1839),sample 30; (F,I) N.dutertrei, a low trochospiral specimen with more umbilical aperture from sample 30.