5.5mm. This small freshwater snail has an operculum. It has a right-handed coiling, elongated shell with 7 or 8 whorls separated by deep grooves and small spines sometimes occur on the widest part of each whorl. The mouth aperture is oval, or pointed oval (almond-shaped), and its height is less than the height of the spire. The mouth also protrudes slightly from the main shell.

Fresh and brackish water habitats.

All year round.

An invasive species now widespread and frequent in most of Britain.

Frequent in Leicestershire and Rutland.