Globigerinoides tenellus Parker, 1958

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 tenellus Parker, 1958

Figs 7G–I

Globigerinoides tenella: Parker 1958: 280 , pl. 6, figs 7–11.

Globigerinoides tenellus: Parker 1962: 232 , pl. 4, figs 11, 12; Pflaumann & Krasheninnikov 1978: 890, pl.

4, figs 1–3; Saito et al. 1981: 50, pl. 11, figs 2a–d; Bolli & Saunders, 1985: 196, fig. 20.7.

Globoturborotalita tenella (Parker) : Loeblich & Tappan 1994: 108, pl. 198, figs 7–15; pl. 204, figs 9–11.

Small trochospiral test with strongly lobate equatorial outline, with 4 globular chambers in final whorl. Subspherical chambers greatly embracing without distinct sutures, rapidly enlarging. Primary aperture umbilical, an open and high arch (almost circular in outline) with a thin lip, secondary aperture(s) small and narrow, but visible on even the smallest specimens.

Remarks: The species differs from G. rubescens in having supplementary aperture(s) and a smoother wall, and from G. ruber by its more lobulate periphery and low trochospire.

Distribution: Equatorial to temperate waters. The species is never numerous in assemblages, and very rare in our material.

Figures

Fig. 7. (A, D) Globigerinella siphonifera (d’Orbigny, 1839), sample 26; (B, E) G. siphonifera, another specimen from sample 26; (C, F) Globigerinoides bulloideus Crescenti, 1966, sample 30; (G–I) Globigerinoides tenellus Parker, 1958, sample 6.