Pyrgo inornata (d’Orbigny, 1846)

Figure 20.4

1846 Biloculina inornata d’Orbigny, p. 266, pl. 16, figs. 7-9.

2010 Pyrgo inornata (d’Orbigny); Margreth, p. 103, pl. 9, fig. 2a-c.

2012 Pyrgo inornata (d’Orbigny); Debenay, p. 117.

Description. Test nearly spherical, outline round, wall porcelaneous, surface smooth; chambers inflated, biconvex, coiling involute, biloculine chamber arrangement; periphery rounded; aperture terminal, oval, bordered by a thick lip, with a broad, flap-like tooth.