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(Gmelin, 1791)

Description (shell):
Shell like Hydrobia ulvae , but with more tumid whorls and a larger umbilicus.

Size:
Up to 4.5 mm high.

Habitat:
In brackish waters, estuaries and sea water with an average salinity.

Distribution:
East coast of the southern North Sea in the outflow of estuaries (Distr. S. stagnorum).

Semisalsa stagnorum