Bithyniidae

Bithyniidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the clade 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
Genera in the family Bithyniidae include:
 * Alocinna Annandale & Prashad, 1919
 * Bithynia Leach, 1818 - type genus
 * Subgenus Bithynia Leach, 1818
 * Subgenus Codiella Locard, 1894
 * † Celekenia Andrusov, 1902
 * Boreoelona Starobogatov & Streletzkaja, 1967
 * Congodoma Mandahl-Barth, 1968
 * † Daciella Wenz, 1942
 * Digoniostoma Annandale, 1920
 * Emmericiopsis Thiele, 1928
 * † Euchilus Sandberger, 1870
 * † Ferebithynia Kókay, 2006
 * Funduella Mandahl-Barth, 1968
 * Gabbiella Mandahl-Barth, 1968
 * Hydrobioides Nevill, 1884
 * Incertihydrobia Verdcourt, 1958
 * Jubaia Mandahl-Barth, 1968
 * Limnitesta Mandahl-Barth, 1974
 * Myosorella Annandale, 1919
 * Neosataria Kulkarni & Khot, 2015
 * Neumayria de Stefani, 1877
 * Parabithynia Pilsbry, 1928
 * Parafossarulus Annandale, 1924
 * Pseudobithynia Glöer & Pešić, 2006
 * Pseudovivipara Annandale, 1918
 * Sierraia Conolly, 1929
 * † Tylopoma Brusina, 1882
 * Wattebledia Crosse, 1886
 * Genera brought into synonymy:
 * Bithinia Leach, 1818: synonym of Bithynia Leach, 1818
 * Bulimus Scopoli, 1777: synonym of Bithynia Leach, 1818
 * Bythinia Stein, 1850: synonym of Bithynia Leach, 1818
 * Digyrcidum Locard, 1882: synonym of Bithynia Leach, 1818
 * Gabbia Tryon, 1865: synonym of Bithynia (Gabbia) Tryon, 1865 represented as Bithynia Leach, 1818
 * Paraelona Beriozkina & Starobogatov, 1994: synonym of Bithynia Leach, 1818