 A very similar shell is found in the genus "Ringicella" Gray, 1847, which was previously considered to be merely a subgenus within "Anostoma", but it is now considered to be a genus in its own right.This is one of the most peculiar genera of land snails.The prominent feature of an upturned aperture (causing the adult snail to carry the shell spire down) is reflected in its scientific name "Anostoma"