''Planorbis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of air-breathing freshwater snails, aquatic pulmonate gastropod

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

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Planorbidae Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instea ...

, the

ram Ram, ram, or RAM may refer to: Animals * A male sheep * Ram cichlid, a freshwater tropical fish People * Ram (given name) * Ram (surname) * Ram (director) (Ramsubramaniam), an Indian Tamil film director * RAM (musician) (born 1974), Dutch * ...

'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 geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...

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

Species

Species within the genus ''Planorbis'' include: ;Subgenus ''Planorbis (Jalpuchorbis)'' Prysjazhnjuk & Kovalenko, 1986 * † ''

Planorbis bolgradensis ''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.Bouchet, P.; Ro ...

'' Prysjazhnjuk & Kovalenko, 1986 * † ''

Planorbis roshkai ''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.Bouchet, P.; Ro ...

'' Prysjazhnjuk & Kovalenko, 1986 ; Subgenus ''Planorbis (Planorbis)'' Müller, 1773 * '' Planorbis corinna'' Gray, 1850 * ''

Planorbis carinatus ''Planorbis carinatus'' is species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ramshorn snails. Description The width of shell of this species is 9–15 mm. The shell has a noticeable k ...

'' O. F. Müller, 1774 * ''

Planorbis moquini ''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.Bouchet, P.; Ro ...

'' Requien, 1848 * ''

Planorbis planorbis ''Planorbis planorbis'' is a species of air-breathing freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails.Neubauer, Thomas A. (2014). ''Planorbis'' (''Planorbis'') ''planorbis'' (Linnaeus, 1758). Acc ...

'' (Linnaeus, 1758) * ''

Planorbis kahuica ''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.Bouchet, P.; Rosen ...

'' Finlay & Laws, 1931 ;Subgenus ? * † ''

Planorbis anceps ''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.Bouchet, P.; Ro ...

'' 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 ''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.Bouchet, P.; Ro ...

'' Mousson, 1874 * † '' Planorbis kochi'' Pavlović, 1927 * † '' Planorbis nisseanus'' Pavlović, 1931 * † '' Planorbis petrovici'' Pavlović, 1931 * † '' Planorbis striatus'' Serres, 1853 * † '' Planorbis truncatocarinatus'' Pavlović, 1931 * † ''

Planorbis verticilloides ''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.Bouchet, P.; Ro ...

'' 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 ''Anisus'' is a genus of small air-breathing freshwater snails, aquatic animal, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family (biology), family Planorbidae, the ramshorn snails and their allies.Rosenberg, G.; Bou ...

'' (Peyrot, 1932) * Subgenus ''Planorbis (Gyrorbis)'' Fitzinger, 1833: synonym of ''

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

'' O. F. Müller, 1774 * Subgenus ''Planorbis (Odontogyrorbis)'' Lörenthey, 1906: synonym of '' Anisus'' (Anisus) Studer, 1820 * Subgenus ''Planorbis (Segmentina)'' Fleming, 1818: synonym of ''

Segmentina ''Segmentina'' is a genus of very small, air-breathing, freshwater snails, aquatic gastropod mollusks or micromollusks in the family Planorbidae, the ramshorn snails. Albrecht et al. (2007)Albrecht C., Kuhn K. & Streit B. (2007). "A molecul ...

'' 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 ''Gyraulus'' is a genus of small, mostly air-breathing, freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails. The genus ''Gyraulus'' is known from the Early Cretaceous to the present. Fossi ...

'' (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 ''Marisa cornuarietis'', common name the Colombian ramshorn apple snail, is a species of large freshwater snail with an operculum, an aquatic gastropod mollusc in the family Ampullariidae, the apple snail family. These snails are popular ...

'' (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 ''

'' Mousson, 1874 * ''Planorbis piscinarum'' Bourguignat, 1852: synonym of ''

Gyraulus piscinarum ''Gyraulus piscinarum'' is a species of gastropods belonging to the family Planorbidae. The species is found in Southeastern Europe (Bulgaria, Turkey) and Western Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion ...

'' (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