Valvata macrostoma



Valvata macrostoma, also known as the large mouthed valve snail, is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Valvatidae, the valve snails.

Distribution
This species occurs in the following countries and islands:
 * Czech Republic - in Bohemia only
 * Slovakia
 * Poland
 * Germany - high endangered (Stark gefährdet)
 * Netherlands
 * Great Britain

Ecology
This freshwater snail lives in marshes and very small canals that have a very rich fauna and calcium-rich water.

Myzyk (2004) described life cycle of Valvata macrostoma.