Neritacea

The superfamily Neritacea is a group of gastropods, commonly known as snails. These snails typically inhabit intertidal marine environments, though some species are found in freshwater, particularly in Indonesia and the Philippines. There are also two groups of land-dwelling Neritacea: one found sparsely in the Old World, and another widely distributed in both the Old and New World tropics. The family Neritidae, which includes the genus Nerita, is characterized by operculate snails with turbinate shells that have a half-moon-shaped aperture and a shelf-like columella. Nerita species specifically have short, smooth or spirally ridged shells with a thick, toothed outer lip and a toothed operculum.123