Pararotalia nipponica (Asano), 1936

Figure 5.11-12

1936 Rotalia nipponica Asano, p. 614, pl. 31, fig. 2a-c.

2012 Pararotalia nipponica (Asano); Debenay, p. 206.

Description. Test subrounded, biconvex, umbilicus with a plug, wall calcareous, perforate on both sides, dorsal surface smooth, ventral surface rough, with pustules; chambers slightly convex, coiling evolute on the spiral side; involute and convex on the ventral side, arranged trochospirally; periphery lobulated and angular with small spines at the chamber ends, sutures curved, limbate on the spiral side, very much depressed on the umbilical side; aperture interiomarginal, umbilical, a slit-like opening.