Group 4: Bivalves (3x Sphaerium sp. & 1x Pisidium sp.)
Pisidium nitidum or the shining pea clam is a species of minute freshwater clam, an aquatic bivalve mollusc in the family Sphaeriidae, the pea clams and fingernail clams.
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List of non-marine molluscs of the Czech Republic
List of non-marine molluscs of Slovakia