See text Bythinellidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the order Littorinimorpha.

They are characterized by a calcareous operculum, a lobe on the upper surface of the neck.

The ctenidium, the respiratory gill-comb, is very broad.

The kidney has a large extension towards the mantle.

[2] Genera in the family Bythinellidae include: