Cancris auriculus (Fichtel and Moll, 1798)

Figure 8.3-4

1798 Nautilus auricula Fichtel and Moll, p. 108, pl. 20, figs. a-c.

2001 Cancris auriculus (Fichtel and Moll); Szarek, p. 132, pl. 19, figs. 1-3.

2003 Cancris auricula (Fichtel and Moll); Murray, p. 19, fig. 6.6-7.

2010 Cancris auriculus (Fichtel and Moll); Margreth, p. 28, pl. 29, fig. 10a-c.

2012 Cancris auriculus (Fichtel and Moll); Debenay, p. 189.

2012 Cancris auriculus (Fichtel and Moll); Milker and Schmiedl, p. 93, fig. 21.14-15.

2014 Cancris auriculus (Fichtel and Moll); Panchang and Nigam, pl. 28, fig. 27a-c.

Description. Test biconvex, outline auriculate, cross section lenticular, wall calcareous, perforate, umbilical area imperforate; surface smooth; chambers rapidly increasing in size, trochospirally arranged, coiling evolute on the spiral side, involute on the umbilical side; peripheral margin carinate and acute, sutures curved and slightly depressed on the spiral side, radial and much depressed on the umbilical side; aperture an interiomarginal, umbilical, slit-like opening with a broad apertural flap.