Globigerina rubescens Hofker, 1956

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 : 240

Globigerina rubescens Hofker, 1956

Figs 6D–F

Globigerina rubescens: Hofker 1956: 234 , pl. 32, figs 18–21; Parker 1962: 226, pl. 2, figs 17–18; Pflaumann

& Krasheninnikov 1978: 889, pl. 1, figs 11–13; Saito et al. 1981: 50, pl. 11, figs 1a–d; Bylinskaya et al. 2002: 127, pl. II, figs 6–8.

Globoturborotalita rubescens (Hofker) : Loeblich & Tappan 1987: 490–491, pl. 537, figs 7–15; 1994: 108,

pl. 208, figs 1–12.

Small trochospiral test with 4 globular chambers in final whorl. Subspherical chambers closely packed, sutures distinct.Aperture umbilical, a high open arch with an imperforate thin rim-like lip. Wall coarsely perforated.

Remarks: This species occasionally has a distinctive pink to red pigmentation in the Late Pleistocene and younger sediments of the Atlantic (Saito et al. 1981; Bylinskaya et al. 2002). Red-coloured forms have not yet been found in surface sediments of the Indian Ocean. The species differs from Globigerinoides tenellus and Globigerinoides ruber in having a more lobulate periphery and in the absence of supplementary apertures; and from other Globigerina species in having a coarsely perforate wall.

Distribution: Temperate to equatorial waters. Very rare in our material.

Figures

Fig.6. (A–C) Globigerina falconensis Blow, 1959, sample 30; (D–F) Globigerina rubescens Hofker,1956, sample 25; (G–I) Globigerinella calida (Parker, 1962), sample 4.