Gyraulus ripariusGyraulus riparius is a species of small freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.DistributionThe distribution of this species is Holarctic: Germany - critically endangered NetherlandsHabitatThis small snail lives on water plants in freshwater.Shell descriptionThe shell is nearly planispiral in its coiling.