TyrrhenariaTyrrhenaria is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Helicidae, the typical snails.This genus has become a junior synonym of Helix Linnaeus, 1758SpeciesSpecies within the genus Tyrrhenaria include:Tyrrhenaria ceratina: synonym of Helix ceratina Shuttleworth, 1843