Planorbis Temporal range: Jurassic–recent PreꞒ Ꞓ O S D C P T J K Pg N
Drawing of a shell of Planorbis planorbis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Superorder:	Hygrophila
Family:	Planorbidae
Subfamily:	Planorbinae
Tribe:	Planorbini
Genus:	Planorbis O. F. Müller, 1774[1]
Species
See text.
Synonyms[2]
Tropidiscus Stein, 1850

Planorbis is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.^[2]

Description

Planorbis shells are flat-coiled and sinistral.

Distribution

This genus has a worldwide distribution. It is known from the Jurassic to the Recent periods.^[3]

Species

Species within the genus Planorbis include:

Subgenus Planorbis (Jalpuchorbis) Prysjazhnjuk & Kovalenko, 1986

• † Planorbis bolgradensis Prysjazhnjuk & Kovalenko, 1986
• † Planorbis roshkai Prysjazhnjuk & Kovalenko, 1986

Subgenus Planorbis (Planorbis) Müller, 1773

• Planorbis corinna Gray, 1850
• Planorbis carinatus O. F. Müller, 1774
• Planorbis moquini Requien, 1848
• Planorbis planorbis (Linnaeus, 1758)
• Planorbis kahuica Finlay & Laws, 1931

Subgenus ?

• † Planorbis anceps Sacco, 1884
• † Planorbis austroalpinus Harzhauser & Neubauer in Harzhauser et al., 2012
• † Planorbis bouei Pavlović, 1932
• † Planorbis fischeri Wenz, 1919
• † Planorbis gladilini Pavlović, 1931
• Planorbis intermixtus Mousson, 1874
• † Planorbis kochi Pavlović, 1927
• † Planorbis nisseanus Pavlović, 1931
• † Planorbis petrovici Pavlović, 1931
• † Planorbis striatus Serres, 1853
• † Planorbis truncatocarinatus Pavlović, 1931
• † Planorbis verticilloides Pavlović, 1931
• † Planorbis zivkovici Pavlović, 1931

Suggenera and species brought into synonymy

• Subgenus Planorbis (Anisus) Studer, 1820: synonym of Anisus Studer, 1820
• Subgenus Planorbis (Armiger) Hartmann, 1843 : synonym of Gyraulus (Armiger) Hartmann, 1843 represented as Gyraulus Charpentier, 1837
• Subgenus Planorbis (Bathyomphalus) Charpentier, 1837: synonym of Bathyomphalus Charpentier, 1837
• Subgenus Planorbis (Coretus) Gray, 1847: synonym of Planorbarius Duméril, 1805
• Subgenus Planorbis (Gyraulus) Agassiz in Charpentier, 1837: synonym of Gyraulus Charpentier, 1837
• † Planorbis (Gyraulus) declivis var. balizacensis Peyrot, 1932: synonym of † Anisus balizacensis (Peyrot, 1932)
• Subgenus Planorbis (Gyrorbis) Fitzinger, 1833: synonym of Valvata O. F. Müller, 1774
• Subgenus Planorbis (Odontogyrorbis) Lörenthey, 1906: synonym of Anisus (Anisus) Studer, 1820
• Subgenus Planorbis (Segmentina) Fleming, 1818: synonym of Segmentina Fleming, 1818
• Planorbis acronicus Férussac, 1807: synonym of Gyraulus acronicus (Férussac, 1807)
• Planorbis albus O. F. Müller, 1774: synonym of Gyraulus albus (O. F. Müller, 1774)
• Planorbis argaeicus Sturany, 1904: synonym of Gyraulus argaeicus (Sturany, 1904)
• Planorbis atkinsoni Johnston, 1879: synonym of Gyraulus atkinsoni (Johnston, 1879)
• Planorbis biwaensis Preston, 1916: synonym of Gyraulus biwaensis (Preston, 1916)
• Planorbis borealis Westerlund, 1875: synonym of Gyraulus borealis (Lovén in Westerlund, 1875)
• Planorbis campanulatus Say, 1821 accepted as Planorbella campanulata (Say, 1821)
• Planorbis chinensis Dunker, 1848: synonym of Gyraulus chinensis (Dunker, 1848)
• Planorbis contrarius O. F. Müller, 1774: synonym of Marisa cornuarietis (Linnaeus, 1758)
• Planorbis convexiusculus Hutton, 1849: synonym of Gyraulus convexiusculus (Hutton, 1849)
• Planorbis costulatus Krauss, 1848: synonym of Gyraulus costulatus (Krauss, 1848)
• Planorbis crosseanus Bourguignat, 1862: synonym of Gyraulus albus (O. F. Müller, 1774)
• Planorbis ehrenbergi Beck, 1837: synonym of Gyraulus ehrenbergi (Beck, 1837)
• Planorbis essingtonensis E. A. Smith, 1882: synonym of Gyraulus essingtonensis (E. A. Smith, 1882)
• Planorbis fragilis Tate, 1896: synonym of Gyraulus essingtonensis (E. A. Smith, 1882)
• Planorbis gredleri Gredler, 1859: synonym of Gyraulus acronicus (Férussac, 1807)
• Planorbis hebraicus Bourguignat, 1852: synonym of Gyraulus hebraicus (Bourguignat, 1852)
• Planorbis hispidus Draparnaud, 1805: synonym of Gyraulus albus (O. F. Müller, 1774)
• Planorbis imbricatus O. F. Müller, 1774: synonym of Gyraulus crista (Linnaeus, 1758) represented as Gyraulus (Armiger) crista (Linnaeus, 1758)
• Planorbis laevis Alder, 1838: synonym of Gyraulus laevis (Alder, 1838)
• Planorbis leucostoma Millet, 1813: synonym of Anisus (Anisus) leucostoma (Millet, 1813)
• Planorbis natalensis Krauss, 1848: synonym of Afrogyrorbis natalensis (Krauss, 1848)
• Planorbis paladilhi Moitessier, 1867: synonym of Gyraulus crista (Linnaeus, 1758) represented as Gyraulus (Armiger) crista (Linnaeus, 1758)
• Planorbis parvus Say, 1817: synonym of Gyraulus parvus (Say, 1817)
• Planorbis persicus Ancey, 1900: synonym of Planorbis intermixtus Mousson, 1874
• Planorbis piscinarum Bourguignat, 1852: synonym of Gyraulus piscinarum (Bourguignat, 1852)
• Planorbis riparius Westerlund, 1865: synonym of Gyraulus riparius (Westerlund, 1865)
• Planorbis rossmaessleri Auerswald, 1851: synonym of Gyraulus rossmaessleri (Auerswald, 1851)
• Planorbis rotula Benson, 1850: synonym of Gyraulus rotula (Benson, 1850)
• Planorbis sivalensis Clessin, 1884: synonym of Gyraulus sivalensis (Clessin, 1884)
• Planorbis spirillus Gould, 1859: synonym of Gyraulus spirillus (Gould, 1859)
• Planorbis spirorbis (Linnaeus, 1758): synonym of Anisus (Anisus) spirorbis (Linnaeus, 1758)
• Planorbis thermalis Westerlund, 1885: synonym of Gyraulus laevis (Alder, 1838)
• Planorbis umbilicatus (Müller, 1773): synonym of Planorbis (Planorbis) planorbis (Linnaeus, 1758)
• Planorbis waterhousei Clessin, 1885: synonym of Gyraulus waterhousei (Clessin, 1885)