''Pisidium dilatatum'' is a species of freshwater bivalve belonging to the family

Sphaeriidae Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams. Heard, William H. 1977. Reproduction of fingernail clams (Sphaeriidae: ''Sphae ...

. It is widespread in Europe and Asia, from southern Sweden in the west to Lake Baikal in the east. It occurs in oligotrophic lakes.

References

Sphaeriidae Molluscs of Asia Molluscs of Europe Freshwater animals of Asia Freshwater animals of Europe Molluscs described in 1897 {{bivalve-stub