The Neritidae Family includes 288 species comprising 2 subfamilies (Neritininae (13 genus), Neritinae (3))
and 16 genus (Nerita (76 species), Clithon (54), Theodoxus (33), Neripteron (27), Vittina (20), Neritina (19), ...)

Phylum      : Mollusca
 Class       : ⤷Gastropoda 
  Subclass    : ⤷Neritimorpha 
   Order       : ⤷Cycloneritida 
    Superfamily : ⤷Neritoidea 
     Family      : ⤷Neritidae

Common name : nerite

Aspect : globular shell, great last turn, low or flattened apex; smooth surface or spiral sculpture; semicircular opening narrowed by the broad collumellar region, flattened more or less toothed; thickened lip often indented; operculum with hooks

Feeding : herbivorous grazers (algae, diatoms, biofilms, and organic detritus); some species also filtering suspended particles from the water while genus Theodoxus (found in Europe and central Asia) are also carnivorous, feeding on aquatic insect larvae

Environment : inhabit a variety of aquatic environments, ranging from marine intertidal zones to brackish estuaries and freshwater rivers, lakes, and streams