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Pupilloidea
	A live Vallonia pulchella (Valloniidae)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subcohort:	Panpulmonata
Superorder:	Eupulmonata
Order:	Stylommatophora
Suborder:	Helicina
Infraorder:	Pupilloidei
Superfamily:	Pupilloidea; Turton, 1831
Families
	See text
Synonyms
	Achatinelloidea Gulick, 1873; Cionelloidea L. Pfeiffer, 1879 ·; Cochlicopoidea Pilsbry, 1900 (1879); Enoidea B. B. Woodward, 1903 (1880); Orculoidea Pilsbry, 1918 ·; Partuloidea Pilsbry, 1900; Vertiginoidea Fitzinger, 1833;

Pupilloidea is a superfamily of small and very small air-breathing land snails, terrestrial gastropods in the infraorder Pupilloidei.^[1] They are diverse in morphology, habitat, and ecological roles.

Description

They are characterized by their small, often cylindrical, ovate, or elongate shells. Their shells can range from smooth to ribbed or striated. They are generally tiny, ranging from a few millimeters to about a centimeter in length. The aperture often has denticles (teeth) or lamellae, which may play roles in predator deterrence or structural support. The margin of the aperture often features a well-defined peristome, sometimes thickened or reflected.

Distribution

Species in this superfamily are cosmopolitan, found on every continent except Antarctica. They can be found in dry and arid regions to temperate forests and even tropical zones.

Taxonomy

This superfamily contains the following families:^[1]

Achatinellidae Gulick, 1873
Agardhiellidae Harl & Páll-Gergely, 2017
Amastridae Pilsbry, 1910
Argnidae Hudec, 1965
Cerastidae Wenz, 1923
Cochlicopidae Pilsbry, 1900 (1879)
Draparnaudiidae Solem, 1962
Enidae B. B. Woodward, 1903 (1880)
Fauxulidae Harl & Páll-Gergely, 2017
Gastrocoptidae Pilsbry, 1918
Lauriidae Steenberg, 1925
Odontocycladidae Hausdorf, 1996
Orculidae Pilsbry, 1918
Pagodulinidae Pilsbry, 1924
Partulidae Pilsbry, 1900
Pleurodiscidae Wenz, 1923
Pupillidae W. Turton, 1831
Pyramidulidae Kennard & B. B. Woodward, 1914
Spelaeoconchidae A. J. Wagner, 1928
Spelaeodiscidae Steenberg, 1925
Strobilopsidae Wenz, 1915
Valloniidae Morse, 1864
Vertiginidae Fitzinger, 1833

Synonyms

Cerastuidae Wenz, 1930: synonym of Cerastidae Wenz, 1923
Chondrulidae A. J. Wagner, 1928: synonym of Chondrulini Wenz, 1923 (junior synonym)
Cionellidae L. Pfeiffer, 1879: synonym of Cochlicopidae Pilsbry, 1900 (1879)
Elasmiatidae Kuroda & Habe, 1949: synonym of Elasmiatini Kuroda & Habe, 1949 (original rank)
Family Pachnodidae Steenberg, 1925: synonym of Cerastidae Wenz, 1923
Pupidae J. Fleming, 1822: synonym of Cerionidae Pilsbry, 1901 (invalid: type genus a junior homonym of Pupa Röding, 1798 [Acteonidae])
Pupisomatidae Iredale, 1940: synonym of Valloniidae Morse, 1864
Pupoididae Iredale, 1939: synonym of Pupillidae W. Turton, 1831
Strobilidae Jooss, 1911: synonym of Strobilopsidae Wenz, 1915 (invalid: type genus a junior homonym of Strobila M. Sars, 1829 [Cnidaria])
Tornatellinidae Sykes, 1900: synonym of Tornatellininae Sykes, 1900 (original rank)
Zuidae Bourguignat, 1884: synonym of Cochlicopidae Pilsbry, 1900 (1879)

References

^ ^a ^b Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia. 47 (1–2). Hackenheim, Germany: ConchBooks: 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.

Bouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia. 61(1-2): 1-526