Pomacea urceus is a species of freshwater gastropod in the family Ampullariidae

Ampullariidae

Ampullariidae, common name the apple snails, is a family of large freshwater snails, aquatic gastropod mollusks with a gill and an operculum...

, native to South America. It is a particularly large species of Pomacea, some specimens of which have been measured 115mm in height.

The eggs of Pomacea urceus vary in color from pale green to orange. Eggs are placed between the undersurface of the operculum

Operculum (gastropod)

The operculum, meaning little lid, is a corneous or calcareous anatomical structure which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails...

and the aperture of the female when she estivates after the mating season.