# Planorbis

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

## 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.

## Species
### Extant species currently in Planorbis

* Planorbis agraulus Bourguignat, 1864
* Planorbis atticus Bourguignat, 1852
* Planorbis carinatus O. F. Müller, 1774
* Planorbis cretensis Glöer & Hirschfelder, 2015
* Planorbis intermixtus Mousson, 1874
* Planorbis kubanicus Soldatenko & Starobogatov, 1998
* Planorbis macedonicus Sturany, 1894
* Planorbis moquini Requien, 1848
* Planorbis planorbis (Linnaeus, 1758)
* Planorbis presbensis Sturany, 1894
* Planorbis vitojensis Glöer & Pešić, 2010

### Fossil species (selection)

* † 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 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
* † Planorbis (Jalpuchorbis) bolgradensis Prysjazhnjuk & Kovalenko, 1986
* † Planorbis (Jalpuchorbis) roshkai Prysjazhnjuk & Kovalenko, 1986

### 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 corinna Gray, 1850 accepted as Gyraulus corinna
* 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 kahuica Finlay & Laws, 1931 accepted as Gyraulus kahuica (Finlay & Laws, 1931)
* 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)