Cribroelphidium excavatum (Terquem, 1875)

Figure 6.3

1875 Polystomella excavatum, Terquem, p. 25, pl. 2, fig. 2a-f.

2008 Cribroelphidium excavatum (Terquem); Riveiros and Patterson, p. 32, fig. 14.1-5.

Description. Test free, slightly compressed, wall calcareous, surface smooth but for pustular sutures, umbilical region and apertural side, umbilicus slightly depressed, with a knob; chambers few, slightly inflated, gradually increasing in size as added, coiling involute, arranged planispirally; periphery broadly rounded, peripheral margin lobulate, sutures distinct, slightly depressed, curved backwards, each intercepted with large pores and short perpendicular sutural joints; aperture interiomarginal, multiple, a series of rounded openings on the apertural face.