Valvata macrostoma, also known as the large mouthed valve snail, is a species of small 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 Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF. Slovakia Poland Germany - high endangered (Stark gefährdet) Glöer P. & Meier-Brook C. (2003). Süsswassermollusken. DJN, pp. 134, page 106, Netherlands Great Britain
Ecology This freshwater snail lives in marshes and very small canals that have a very rich fauna and calcium-rich water.Janus, Horst, (1965). The young specialist looks at land and freshwater molluscs. Burke, London.
Myzyk (2004)Myzyk S. (2004). "Life cycle of Valvata macrostoma Mörch, 1864 (Gastropoda: Heterobranchia) in the laboratory". Folia Malacologica 12(3): 111-136. PDF. described life cycle of Valvata macrostoma.
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