Bythinellidae
Bythinellidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the order Littorinimorpha.
Their minute shell is often colored. 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. They have a ciliary feeding habit. The kidney has a large extension towards the mantle.Genera in the family Bythinellidae include:
;Genera brought into synonymy:
- Acrophlyctis Cossmann, 1888 †: synonym of Bythinella Cossmann, 1888 † represented as Bythinella Moquin-Tandon, 1856
- Bithinella : synonym of Bythinella Moquin-Tandon, 1856
- Bithynella Moquin-Tandon, 1856: synonym of Bythinella Moquin-Tandon, 1856
- Bythynella: synonym of Bythinella Moquin-Tandon, 1856
- Microna Frauenfeld, 1863: synonym of Bythinella Moquin-Tandon, 1856
