''Planorbis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of air-breathing

freshwater snail Freshwater snails are gastropod mollusks which 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 ...

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 includ ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

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 Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

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 ins ...

, 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 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 Mya. The J ...

to the

Recent The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together ...

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 ''Planorbis corinna'' is a species of minute, air-breathing freshwater snail, an Aquatic animal, aquatic pulmonate gastropod mollusk, or micromollusk in the family (biology), family Planorbidae, the sheep, ram's horn snails, or planorbids. All ...

'' 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 ''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 ...

'' Harzhauser & Neubauer in Harzhauser et al., 2012 * † ''

Planorbis bouei ''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, 1932 * † ''

Planorbis fischeri ''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 ...

'' Wenz, 1919 * † ''

Planorbis gladilini ''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 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 ''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, 1927 * † ''

Planorbis nisseanus ''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.; Rose ...

'' Pavlović, 1931 * † ''

Planorbis petrovici ''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.; Rose ...

'' Pavlović, 1931 * † ''

Planorbis striatus ''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.; Rose ...

'' Serres, 1853 * † ''

Planorbis truncatocarinatus ''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.; Rose ...

'' 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 ''Anisus'' is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family Planorbidae, the ramshorn snails and their allies.Rosenberg, G.; Bouchet, P. (2014). Anisus. Accessed ...

'' Studer, 1820 * Subgenus ''Planorbis (Armiger)'' Hartmann, 1843 : synonym of ''Gyraulus (Armiger)'' Hartmann, 1843 represented as ''

Gyraulus ''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 ...

'' 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 ''

'' Charpentier, 1837 * † ''Planorbis (Gyraulus) declivis'' var. ''balizacensis'' Peyrot, 1932: synonym of † ''

Anisus balizacensis ''Anisus'' is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family Planorbidae, the ramshorn snails and their allies.Rosenberg, G.; Bouchet, P. (2014). Anisus. Accessed ...

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

'' (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 ''Gyraulus laevis'' is a small species of freshwater snail, an aquatic pulmonate gastropod mollusc in the family Planorbidae, the ram's horn snails. Distribution Found mainly in the northern parts of Europe East to Siberia and north-east Asia. ...

'' (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 ''Gyraulus parvus'' is a species of freshwater snail in the family Planorbidae, the ram's horn snails. It is known by the common name ash gyro.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 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 ''Gyraulus rossmaessleri'' is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. Distribution The distribution of this species is Holarctic. It occurs in countries an ...

'' (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 ''

'' (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