Rotalinoides compressiuscula (Brady, 1884)

Figure 4.19-21

1884 Rotalia papillosa var. compressiuscula Brady, p. 708, pl. 107, fig. 1.

2015 Rotalinoides compressiuscula (Brady); Hanagata and Nobuhara, p. 119, fig. 35.11-12.

Description. Test subcircular, wall calcareous, perforate, surface smooth; initial chambers indistinct, gradually increasing in size as added, chamber arrangement trochospiral, flattened to slightly convex on the dorsal side, triangular and convex on the ventral side; periphery lobulated with a thin keel, sutures initially beaded, arcuate on the spiral side, radial on the umbilical side; aperture narrow, slit-like openings at the basal end of the apertural face.