Nonion costiferum Cushman, 1926

Figure 7.13

1926 Nonionina costifera Cushman, p. 90, pl. 13, fig. 2a-c.

2014 Nonion costiferum Cushman; Panchang and Nigam, pl. 33, fig. 10a-b.

Description. Test elongate, compressed, umbilical portion depressed, wall finely perforate, surface smooth, umbilicus and the apertural side covered with pustules; chambers many, distinct, not inflated, of uniform size; periphery acute, slightly keeled, sutures distinct, slightly raised and costate; aperture an interiomarginal, small, low arch opening at the basal end of the apertural face.