Truncatella subcylindrica
Truncatella subcylindrica is a species of small land snail that lives at the edge of the sea. It has gills and an operculum and is gastropod mollusk or micromollusk in the family Truncatellidae. Description 

This species of snail has a shell which is light in color, and which can reach 5 mm in length. Like all other species in this genus, the shell loses its apical whorls as it grows, giving it a truncated and cylindrical appearance. Distribution 
This snail is native to areas of the northeastern Atlantic coastline, from Morocco and the Mediterranean coast to the Black Sea. This native distribution includes Great Britain. There are also some early records from the late 1800s for the eastern United States, on the coast of Newport, Rhode Island, where it was presumably introduced. Habitat 

This species is found in marine coastal environments, near or just above the high tide line on stones and pebbles, fine sediments and decomposing vegetation. It prefers the edge of sheltered waters where the salinity is at 18–40 psu. Life cycle 
The sexes are separate. Fertilized eggs are laid as egg capsules, which are attached to detritus. References
This article incorporates public domain text from the reference

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Truncatellidae
Molluscs of the Atlantic Ocean
Gastropods of Africa
Marine molluscs of Europe
Molluscs of the Black Sea
Molluscs of the Mediterranean Sea
Taxa named by Carl Linnaeus
Gastropods described in 1767