Littorinoidea

{{Short description|Superfamily of gastropods}}

{{Automatic taxobox

| taxon = Littorinoidea

| image = Tudorella sulcata shell.jpg

| image_caption = Apertural view of a shell and an operculum of the land snail Tudorella sulcata in the family Pomatiidae

| image_alt = Apertural view of a shell and an operculum of the land snail Tudorella sulcata in the family Pomatiidae

| image2 = Tropidofora fimbriata haemostoma IleRonde 8605.jpg

| image2_caption = The land snail Tropidophora fimbriata

| image2_alt = The land snail Tropidophora fimbriata

|authority = Children, 1834Children, J. G. (1834). Synopsis of the contents of the British Museum. ed. 28: 110.

| subdivision_ranks = Families

| subdivision = See text

| synonyms =

}}

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.{{Cite journal |last=Bouchet |first=P. |last2=Rocroi |first2=J.-P. |name-list-style=amp |year=2005 |title=Classification and Nomenclator of Gastropod Families |url=https://www.biodiversitylibrary.org/page/25127194 |journal=Malacologia |volume=47 |issue=1–2 |pages=250}}

The terrestrial family within this group, the Pomatiidae, are sometimes called "land winkles"Journal of Molluscan Studies, GENETIC AND MORPHOLOGICAL VARIATION IN THE LAND WINKLE POMATIAS ELEGANS (MÜLLER) (CAENOGASTROPODA: POMATIASIDAE) Volume 67, Issue 2, pp 145–152 (http://mollus.oxfordjournals.org/content/67/2/145.abstract) Accessed 2014-9-2 because the group originated in the sea and the closely related family Littorinidae are known as "winkles".{{Cite book |url=https://books.google.com/books?id=xw32w-KNt-8C&pg=PA1998 |title=The Coast Way: A Portrait of the English on the Lower North Shore of the St Lawrence |date=1988 |publisher=McGill-Queen's Press - MQUP |isbn=978-0-7735-0654-1 |pages=135 |language=en}}