Hydrobia acuta neglecta

Hydrobia acuta neglecta is a European subspecies of small brackish water snail with a gill and an operculum, an aquatic gastropod mollusc in the family Hydrobiidae.

Distribution
This species which has a distribution type: oceanic temperate occurs on the coasts of the North Sea, in countries and islands including:
 * Iceland
 * Denmark
 * Sweden
 * Great Britain
 * Ireland
 * France

Ecology
Hydrobia acuta neglecta occurs in coastal lagoons where incoming freshwater dilutes sea water. The preferred salinity range is 10-24 ‰.

Status
The status of this taxon is uncertain. Hydrobia neglecta is treated as a full species in Fauna Europaea, but in 1995 it had been suggested that H. neglecta is a synonym of the Mediterranean Hydrobia acuta (Draparnaud). Then a neglecta colony in northern France was shown to be acuta. In 2000 a molecular study concluded that north-west European populations were not specifically distinct from the Mediterranean Hydrobia acuta and designated them subspecies neglecta Muus.