The
Aciculidae are a
family of minute
land snails which have
opercula. (An operculum is a little door that closes the shell when the animal retracts into it.) In other words, Aciculidae are
terrestrial operculate
gastropods. Even though Aciculidae are land snails, they live in rather wet conditions, among mosses and dead leaves and they have sometimes been described as "
winkles come ashore".