''Planorbis'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of air-breathing

freshwater snail Freshwater snails are gastropod mollusks that live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs t ...

s, aquatic

pulmonate Pulmonata or pulmonates is an informal group (previously an order, and before that, a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group inclu ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Planorbidae Planorbidae, common name the ramshorn snails or ram's horn snails, is a family (biology), family of air-breathing freshwater snails, Aquatic animal, aquatic pulmonate gastropod Mollusca, molluscs. Unlike most molluscs, the blood of ram's horn sn ...

, the

ram Ram, ram, or RAM most commonly refers to: * A male sheep * Random-access memory, computer memory * Ram Trucks, US, since 2009 ** List of vehicles named Dodge Ram, trucks and vans ** Ram Pickup, produced by Ram Trucks Ram, ram, or RAM may also ref ...

's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.Bouchet, P.; Rosenberg, G. (2014). Planorbis O. F. Müller, 1773. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=182692 on 2014-11-23

Description

''Planorbis'' shells are flat-coiled and sinistral.

Distribution

This genus has a worldwide distribution. It is known from the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

to the

Recent The Holocene () is the current geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Qu ...

periods.(in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: ''Základy zoopaleontologie''. - Olomouc, 1996. 264 pp., .

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 ''Planorbis'' is a genus of air-breathing freshwater snails, aquatic animal, aquatic pulmonate gastropod molluscs in the family (biology), family Planorbidae, the sheep, ram's horn snails, or planorbids. All species in this genus have sinistral o ...

'' 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 ''Valvata'' is a genus of very small freshwater snails with an Operculum (gastropod), operculum, Aquatic animal, aquatic gastropod mollusks in the family Valvatidae, the valve snails.Bouchet, P.; Rosenberg, G. (2014). Valvata O. F. Müller, 1774. ...

'' 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)

Description

Distribution

Species

References

Further reading