Viviparus contectus

Viviparus contectus, common name Lister's river snail, is a species of large, freshwater snail with an operculum and a gill, an aquatic gastropod mollusk in the family Viviparidae, the river snails.

Distribution
This is not a native of the UK. This species is palaearctic in distribution, specifically Europe and western Siberia, including:


 * Great Britain, specifically eastern England
 * Netherlands
 * Germany - endangered (3 gefährdet)
 * Austria
 * Czech Republic - near threatened (NT)
 * Slovakia
 * Russia - Sverdlovsk oblast

Habitat
This large snail lives in slow flowing rivers and canals which are unpolluted, and which have hard water with many water weeds.