Sphaeroidinella dehiscens (Parker and Jones, 1865)

Figure 14.9-10

1865 Sphaeroidinella bulloides d’Orbigny var. dehiscens Parker and Jones, p. 369, pl. 19, fig. 5a-b.

2010 Sphaeroidinella dehiscens (Parker and Jones); Ovechkina, Bylinskaya, and Uken, p. 248, fig. 9F, 9G.

Description. Test large, ovoid, outline weakly lobulate, wall calcareous, coarsely perforate, surface smooth and glossy in adults; chambers globular, rapidly increasing in size as added, chamber arrangement trochospiral, coiling tight, periphery broadly rounded, sutures depressed initially, later obscured by surface cortex in adults; aperture interiomarginal, umbilical in juveniles, slit-like in adults, with a continuous crenulated lip along the cortical margins.