lesser ramshorn snail
anisus vorticulus latin

The ramshorn snail, Anisus vorticulus is a species of minute, air-breathing, freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails.

Two further sites in Sussex are being considered as candidate SACs: The Arun Valley and the Pevensey Levels are two of four UK sites for the endangered Little Whirlpool Ram's-Horn Snail (Anisus vorticulus).