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

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.

This Sphaeriidae-related article is a stub.