Amphicoryna scalaris (Batsch, 1791)

Figure 2.1-2

1791 Nautilus (Ortoceras) scalaris Batsch, p. 1, 4, pl. 2, fig. 4a-b.

2001 Amphicoryna scalaris (Batsch); Szarek, p. 201, pl. 14, fig. 18.

2003 Amphicoryna scalaris (Batsch); Murray, p. 17, fig. 5.1.

2010 Amphicoryna scalaris (Batsch); Margreth, p. 153, pl. 13, figs. 2-3.

2012 Amphicoryna scalaris (Batsch); Milker and Schmiedl, p. 73, fig. 18.22-25.

2012 Amphicoryna scalaris (Batsch); Debenay, p. 162.

Description. Test elongate, wall calcareous, surface ornamented with many striae and basal apiculate spine; chambers globular, chamber arrangement uniserial; sutures depressed; aperture crescent-shaped or radiate at the end of a long neck, rimmed, enveloped by concentric ridges.