Ammonia parkinsoniana (d’Orbigny, 1839b)

Figure 4.9-10

1839b Rosalina parkinsoniana d’Orbigny, p. 99, pl. 4, figs. 25-27.

2012 Ammonia beccarii (Linnaeus); Milker and Schmiedl, p. 117, figs. 27.3-4.

2015 Ammonia parkinsoniana (d’Orbigny); Hanagata and Nobuhara, p. 119, fig. 35.7-8.

Description. Test small, circular, spiral side convex, umbilical side flattened, wall calcareous, perforate, surface smooth; chambers subglobular, inflated on the spiral side, triangular on the umbilical side, arranged trochospirally; periphery broadly rounded, sutures nearly straight on the spiral side, radial on the umbilical side; umbilicus deeply sutured, with a calcitic knob; aperture an interiomarginal opening.