Ringicella

The adult snails in this genus carry their shells upside down, with the spire or apex at the bottom, and the umbilicus at the top.

[1] This section is based on the anatomy of Ringicella ringens, which is also valid for the genus Anostoma (according to 1901 information from Pilsbry).

The radula of Ringicella (and also Macrodontes) is rather aberrant for Bulimulinae: the central and lateral teeth have no side cusps, the marginals have an ectocone; the basal plate is short.

The elongation of the whole genital system is greater than in Helicoid snails generally, and doubtless correlated with the unusual length of the last whorl.

[1] Araujo (1963)[4] described male copulatory organs of Ringicella ringens as spirally coiled, that is different from previous description by Fischer and by Pilsbry.

A drawing of a preserved specimen of Ringicella ringens as seen from the underside. The view shows the under surface of the foot, the head, the shell aperture , and the spire of the shell. Note the perforation in the lip of the shell.
Drawing of aperture of Ringicella carinatum showing the apertural teeth and the perforation in the peristome
A colored drawing of an adult shell of Ringicella carinatum
A colored drawing of an adult shell of Ringicella ringens