Littorinoidea are a

superfamily SUPERFAMILY is a database and search platform of structural and functional annotation for all proteins and genomes. It classifies amino acid sequences into known structural domains, especially into SCOP superfamilies. Domains are functional, str ...

of both

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

s and

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

s which have a

gill A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

and an operculum,

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

and

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...

Littorinimorpha Littorinimorpha is a large order of snails, gastropods, consisting primarily of sea snails ( marine species), but also including some freshwater snails ( aquatic species) and land snails (terrestrial species).Bouchet P. & Rocroi J.-P. (Ed.); Fr� ...

. The terrestrial family within this group, the

Pomatiidae The family Pomatiidae is a taxonomic family of small operculate land snails, terrestrial gastropod mollusks that can be found over the warmer parts of the Old World. In the older literature, this family is designated as Pomatiasidae. This famil ...

, 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".

Taxonomy

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

Littorinidae The Littorinidae are a taxonomic family of over 200 species of sea snails, marine gastropod molluscs in the clade Littorinimorpha, commonly known as periwinkles and found worldwide. Names In English-speaking countries, gastropod molluscs from o ...

Children A child ( : children) is a human being between the stages of birth and puberty, or between the developmental period of infancy and puberty. The legal definition of ''child'' generally refers to a minor, otherwise known as a person younger ...

, 1834 - the periwinkles **Subfamily Littorininae

, 1834 **Subfamily Lacuninae Gray, 1857 **Subfamily Laevilitorininae Reid, 1989 * † Bohaispiridae Youluo, 1978 *

Pickworthiidae Pickworthiidae is a family (biology), family of small sea snails, marine (ocean), marine gastropod molluscs in the superfamily Cerithioidea. MolluscaBase eds. (2021). MolluscaBase. Pickworthiidae Iredale, 1917. Accessed through: World Register of ...

Iredale, 1917 ** Subfamily Pickworthiinae Iredale, 1917 (synonym: Reynellonidae Iredale, 1917) ** Subfamily Pelycidiinae Ponder & Hall, 1983 ** Subfamily Sherborniinae Iredale, 1917 *

Newton, 1891 (1828) ** Subfamily Pomatiinae Newton, 1891 *

Annulariidae The family Annulariidae is a taxonomic family of small operculate land snails in the superfamily Littorinoidea.MolluscaBase eds. (2020). MolluscaBase. Annulariidae Henderson & Bartsch, 1920. Accessed through: World Register of Marine Species at ...

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 The Zerotulidae comprise a taxonomic family of sea snails, marine gastropod molluscs in the superfamily Littorinoidea Littorinoidea are a superfamily of both sea snails and land snails which have a gill and an operculum, terrestrial and ma ...

Warén & Hain, 1996 (Extinct taxa are indicated by a

dagger A dagger is a fighting knife with a very sharp point and usually two sharp edges, typically designed or capable of being used as a thrusting or stabbing weapon.State v. Martin, 633 S.W.2d 80 (Mo. 1982): This is the dictionary or popular-use de ...

, †.) ;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

{{Taxonbar, from=Q6653350 Littorinimorpha Gastropod superfamilies Taxa named by John George Children