Littorinoidea are a superfamily of both sea snails and land snails which have a gill and an operculum, terrestrial and marine gastropod mollusks in the clade Littorinimorpha. The terrestrial family within this group, the Pomatiidae, are sometimes called "land winkles" because the group originated in the sea and the closely related family Littorinidae are known as "winkles".

Taxonomy

These families and subfamilies have been recognized in the taxonomy of Bouchet & Rocroi (2005): (Extinct taxa are indicated by a dagger, †.)