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Map of the sites holding the search term ""Valvata macrostoma""

There are 5 sites that mention "Valvata macrostoma".

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River Test

… rich in aquatic molluscs, with two national rarities RDB,* see note, reported, Valvata macrostoma RDB2 and Odhneripisidium tenuilineatum RDB3. The former is a calcicole snail living in still or slow flowing water amongst abundant submerged vegetation, the latter is a pea mussel …

River Avon System

… snail. From the lower river two species of aquatic mollusc have been recorded, Valvata macrostoma vulnerable status and the pea mussel Odhneripisidium tenuilineatum rare status, both inhabitants of slow flowing waters. Birds The river system and its adjacent vegetation provide a…

Avon Valley (Bickton to Christchurch)

… Salmo trutta Molluscs are particularly abundant including the rare water snail Valvata macrostoma and the pea mussel Odhneripisidium tenuilineatum. Although locally modified by dredging and other engineering activities significant stretches of the river survive which exhibit cla…

Pevensey Levels

…getation. Particularly widespread and abundant on this site is an aquatic snail Valvata macrostoma RDB, Vulnerable. Of the many species of water beetle recorded at the site, the most interesting are confined to the ditches in areas of permanent pasture. Of particular interest is …

Upton Broad & Marshes

…includes eighteen species of freshwater snail including Viviparus contectus and Valvata macrostoma which are both of restricted distribution. Surrounding the Broad is swamp vegetation which is unusual for the prominence of saw sedge Cladium mariscus, in having both species of Ree…

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