Shells are cap-shaped, globular, or semiglobose, the spire low to flat, often submerged by last whorl, surface generally smooth, sometimes with spines. Periostracum usually thick or at least well developed. Colour may vary from black to multi-coloured often with distinct and complex colour patterns. Columellar very pronounced, broad and shelf-like, sometimes with wing-like projections, and often brightly coloured; columellar edge smooth or with fine denticulations. There is no umbilicus. The operculum is ‘D’ shaped with a smooth glossy outer surface often spirally patterned, with a prominent internal often bi-lobed elongated peg (apophysis) and a low internal spiral raised area or bulge mid-way.
The cephalic tentacles are narrow with the eye situated on a short stalk next to the outer edge of the tentacle. Snout short and truncated with a scalloped edge. The spermatophores are variable in length, with or without an enclosing envelope or an internal radial thread but never with an external filament. Vaginal duct long and leaves the vagina near the spermatophore sac. Penes are variable but generally an external long curved organ with a prominent lateral or terminal groove, there is never a penis pouch in the male head.
Neritina Lamarck, 1816
Genus Neritina Rafinesque, 1815
Type species: Nerita pulligera Linnaeus, 1767
Original reference: Rafinesque C.S. [-Schmaltz]. (1815). Analyse de la Nature ou Tableau de l'univers et des corps organisés, pp. 1-224.
Type locality: Indie fluviis (India).
Indo Pacific, Central America, Caribbean and Atlantic West Africa. In Australia restricted to NE Queensland.
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Smith, B. J. (1992). Non-marine Mollusca. Pp. i-xii, 1-408 in W. W. K. Houston. Zoological Catalogue of Australia, 8. Canberra, Australian Government Publishing Service.