Littorinoidea

Littorinoidea
Apertural view of a shell and an operculum of the land snail Tudorella sulcata in the family Pomatiidae
The land snail Tropidophora fimbriata
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha
Superfamily:	Littorinoidea Children, 1834
Families
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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".

These families and subfamilies have been recognized in the taxonomy of Bouchet & Rocroi (2005):

(Extinct taxa are indicated by a dagger, †.)

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