Truncatellidae

Truncatellidae, common name the 'looping snails', is a family of small amphibious snails, with gills and an operculum, semi-marine gastropod mollusks or micromollusks. This family of snails have small shells which lose their apical whorls as they continue to grow, giving the shells a truncated and cylindrical appearance. The family Truncatellidae consists of two subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005):