Globorotalia ungulata Bermúdez, 1961

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 : 236

Globorotalia ungulata Bermúdez, 1961

Figs 3C, 3F, 3I

Globorotalia ungulata: Bermúdez 1961: 1304 , pl. 15, figs 6a–b; Blow, 1969: 371, pl. 8, figs 13–15; Pflaumann

& Krasheninnikov 1978: 892, pl. 5, figs 5–7; Saito et al. 1981: 155–156, pl. 53, figs 2a–b, 3a–b; Bolli

& Saunders 1985: 230, figs 32.2; Loeblich & Tappan 1994: 101, pl. 182, figs 1–12.

Globorotalia menardii ungulata Bermúdez : Todd 1964: 1093, pl. 295, fig. 3; Todd 1965: 71, pl. 28, fig. 3. Small to medium biconvex trochospiral test with about 5 wedge-shaped chambers in the final whorl. On the spiral side chambers slightly reniform, nearly flat; on the ventral side, subtriangular, inflated.The final chamber has a high umbilical shoulder. Peripheral keel thin.Aperture interiomarginal, a very low slit-like opening at the base of umbilical shoulder with a large plate-like umbilical lip.

Remarks: This species can be easily recognized by its high umbilical face and its thin, shiny, elliptical test. Because of its elongate, somewhat inflated test G. ungulata was occasionally considered to be related to G. tumida ; however, we believe it to be closer to the G. menardii – G. cultrata complex.

Distribution: Equatorial and tropical waters. Quite rare in our material.

Figures

Fig. 3. (A, D) Globorotalia cultrata (d’Orbigny, 1839), sample 25; (B, E) Globorotalia menardii (Parker, Jones & Brady, 1865), sample 30; (C, F) Globorotalia ungulata Bermúdez, 1961, sample 25; (G, H) Globorotalia tumida (Brady, 1877), sample 26; (I) Globorotalia ungulata Bermúdez, 1961, sample 30.