Truncatellidae
# 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.

## Shell description

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.

## Subfamilies

The family Truncatellidae consists of two subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005):

* subfamily Truncatellinae Gray, 1840
* subfamily Geomelaniinae Kobelt & Möllendorff, 1897

## Genera

Genera within the family Truncatellidae include:

Truncatellinae

* Truncatella Risso, 1826 - type genus of the family Truncatellidae

Geomelaniinae

* Geomelania L. Pfeiffer, 1845 - type genus of the subfamily Geomelaniinae

subfamily ?

* †Nystia
* Taheitia Adams, 1863

## Habitat

Snails in this family are found in marine coastal environments, near or just above the high tide line on stones and pebbles, fine sediments and decomposing vegetation.

## Life cycle

The sexes are separate. Fertilized eggs are laid as egg capsules, which are attached to detritus.

