Pila saxeaPila saxea, common name the stony ampullaria, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.DescriptionThe shell is oblong-ovate and rather solid, featuring a narrow, covered umbilicus. The spire is rather obtuse. The whorls are a little depressed around the upper part, obsoletely angled, and then rounded. The shell appears olive. The aperture is pyriformly oblong, and the columellar lip is thinly reflected.DistributionThis species occurs in India and the Philippines.