The family lives in marine, estuarine, brackish and freshwater environments. Shells minute, littoriniform, imperforate or with a tiny umbilical slit; aperture droplet-shaped, slightly protruding.
 

shell « elongate-conic to elongate-globose » (Tucker Abbott), often varying in shape inside a same species, with or without umbilical perforation.
 

shell globose, with a short spire and a convex, inflated last whorl.