Neogloboquadrina incompta ( Cifelli, 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 : 238

Neogloboquadrina incompta ( Cifelli, 1961)

Figs 4D, 4G

Globigerina incompta: Cifelli 1961: 83 , pl. 4, figs 1–7.

Globigerina pachyderma incompta (Cifelli) : Cifelli 1965: 11, pl. 1, figs 4–6.

Test small with partly embracing chambers, 4 or 4.5 globular chambers in the final whorl. Aperture umbilical, interiomarginal but extending almost to the periphery, a low arch with a thin projecting rim. Wall thin, finely porous, granular.

Remarks: Differs from N. dutertrei in being smaller and in having a more compact test. Distribution: North Atlantic (surface plankton), latest Pliocene and Pleistocene sediments from northern Japan. Only two specimens were recorded 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.