Pileolina patelliformis (Brady, 1884)

Figure 12.17-19

1884 Discorbis patelliformis Brady, p. 647, pl. 88, fig. 3a-c.

2010 Glabratella patelliformis (Brady); Margreth, p. 120, pl. 32, fig. 3a-c.

2012 Pileolina patelliformis (Brady); Debenay, p. 208.

2012 Pileolina patelliformis (Brady); Milker and Schmiedl, p. 102, fig. 23.16-17.

Description. Test subtriangular, planoconvex, wall calcareous, densely perforate on the spiral side and finely perforate on the umbilical side, surface rough, umbilical side depressed, ornamented with radiating pustules; chambers long, narrow and semicircular, spiral side strongly convex, conical with a bluntly pointing apex, gradually increasing in size as added, umbilical side flattened, arranged trochospirally, coiling evolute; periphery rounded, sutures curved on the spiral side; aperture an interiomarginal, low slit-like opening.