Pisidium pseudosphaerium

Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.

Description
The 2.5-3.2mm shell is a flattened, regular, slightly angulated oval shape with low central umbos. The surface is silky with very fine concentric striations. In colour it is straw-yellow with scattered red-brown deposits.

Distribution
Its native distribution is central European and western European.


 * Czech Republic - in Bohemia, in Moravia, critically endangered (CR)
 * Germany - critically endangered (vom Aussterben bedroht)
 * Nordic countries: Denmark, Finland (near threatened ), Norway and Sweden (not recorded in Faroes, Iceland)
 * Great Britain and Ireland