Cuneus (foram)

Cuneus is a genus of foraminifera in the Rotaliida found in Upper Cretaceous (Coniacian) to Paleocene marine sediments throughout the boreal regions.

The test is pyramidal in form, triserial throughout, with a triangular section, and may be slightly twisted. The test wall is calcareous, transparent. and finely perforate, the surface smooth. Sides are flat to slightly concave; sutures flush and oblique. The aperture is a narrow vertical loop on the apertural face of the final chamber.