Elphidium advenum subsp. limbatum (Chapman, 1907)

Figure 6.6

1907 Polystomella macellum var. limbatum Chapman, p. 142, pl. 10, fig. 9.

2012 Elphidium limbatum (Chapman); Debenay, p. 220.

Description. Test large, wall calcareous, finely perforate, surface ornamented with granular pustules along the sutures, umbilical region and the apertural side, umbilicus with a definite boss; chambers many, increasing in size as added, final chambers more inflated, arranged planispirally; periphery rounded, margin slightly keeled, sutures distinct and curved, retral processes broad, closely spaced; aperture interiomarginal, multiple, small pores along the apertural face.