Littorinoidea

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.^[2]

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
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Littorinoidea Children, 1834[1]
Families
See text

The terrestrial family within this group, the Pomatiidae, are sometimes called "land winkles"^[3] because the group originated in the sea and the closely related family Littorinidae are known as "winkles".^[4]

Taxonomy

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

• Littorinidae Children, 1834 - the periwinkles
  • Subfamily Littorininae Children, 1834
  • Subfamily Lacuninae Gray, 1857
  • Subfamily Laevilitorininae Reid, 1989
• † Bohaispiridae Youluo, 1978
• Pickworthiidae Iredale, 1917
  • Subfamily Pickworthiinae Iredale, 1917 (synonym: Reynellonidae Iredale, 1917)
  • Subfamily Pelycidiinae Ponder & Hall, 1983
  • Subfamily Sherborniinae Iredale, 1917
• Pomatiidae Newton, 1891 (1828)
  • Subfamily Pomatiinae Newton, 1891
• Annulariidae Henderson & Bartsch, 1920
  • Subfamily Annulariinae Henderson & Bartsch, 1920
  • Subfamily Rhytidopomatinae Henderson & Bartsch, 1920
  • Subfamily Tudorinae Watters, 2006
• † Purpurinidae Zittel, 1895
• Skeneopsidae Iredale, 1915
• † Tripartellidae Gründel, 2001
• Zerotulidae Warén & Hain, 1996

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

Families brought into synonymy

• Bembiciidae: synonym of Lacuninae
• Cyclostomatidae: synonym of Pomatiidae
• Ericiidae: synonym of Pomatiidae
• Faxiidae: synonym of Sherborniinae
• Lacunidae: synonym of Littorinidae
• Melarhaphidae: synonym of Littorininae
• Reynellonidae: synonym of Pickworthiinae
• Risellidae: synonym of Lacuninae

References

1. Children, J. G. (1834). Synopsis of the contents of the British Museum. ed. 28: 110.
2. Bouchet, P. & Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2): 250.
3. 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
4. The Coast Way: A Portrait of the English on the Lower North Shore of the St Lawrence. McGill-Queen's Press - MQUP. 1988. p. 135. ISBN 978-0-7735-0654-1.