多旋螺屬

多旋螺屬（學名：Anisus）是腹足綱之下的一個可呼吸空氣的淡水螺的屬^[4]。原屬有肺目基眼亞目，今屬異鰓類泛有肺類喜溼螺類支序的扁卷螺科扁卷螺亞科扁卷螺族^[2]。 本屬所有物種的螺殼都是左旋的平旋殼（planispiral）^[5]，與一般腹足綱物種的外殼形狀不同。外殼看似是右旋，但其實是螺把殼上下顛倒來揹在身上，使左旋的外殼看起來像是右旋。

多旋螺屬
Shells of Anisus vorticulus
科學分類
界：	動物界 Animalia
門：	軟體動物門 Mollusca
綱：	腹足綱 Gastropoda
科：	扁蜷科 Planorbidae
亞科：	扁蜷亞科 Planorbinae
族：	扁蜷族 Planorbini
屬：	多旋螺屬 Anisus Studer, 1820[1]
種
見內文
異名[2]
見內文

異名

• Anisus (Spiralina) Martens, 1899 (junior homonym of Spiralina Chaster, 1898; junior synonym)
• Paraspira Dall, 1905
• Paraspira (Paraspira) Dall, 1905
• Planorbis (Anisus) Studer, 1820 (combination not accepted)
• Spiralina Martens, 1899 (junior homonym of Spiralina Chaster, 1898; junior synonym)

物種

本屬包括下列各個物種：

• 擬旋多旋螺 Anisus paravortex（Ping & Yen）
• 扭曲多旋螺 Anisus contortus（Linnaeus）

本屬包括以下各個亞屬：

Subgenus Anisus

• Anisus calculiformis (Sandberger, 1874)
• † Anisus komarovae Prysjazhnjuk, 1974
• † Anisus krambergeri (Halaváts, 1903)
• † Anisus laskarevi Milošević, 1976
• Anisus leucostoma (Millet, 1813)
• † Anisus septemgyratiformis (Gottschick, 1911)
• Anisus septemgyratus (Rossmässler, 1835)
• Anisus spirorbis (Linnaeus, 1758) - the type species of the genus^[6]
• Anisus strauchianus (Clessin, 1884)^[6]

Subgenus Anisus (Costorbis) Lindholm, 1926

• † Anisus densecostatus Schütt, 1994

Subgenus Disculifer C. Boettger 1944

• † Anisus omalus (Bourguignat, 1881)
• Anisus vorticulus^[6]

Subgenus ?

• † Anisus angulatus (Clessin, 1877)
• † Anisus balizacensis (Peyrot, 1932)
• † Anisus brunnensis (Sauerzopf, 1953)
• † Anisus confusus Soós, 1934
• † Anisus depressissimus (Sacco, 1886)
• † Anisus dupuyianus (Noulet, 1854)
• † Anisus falsani (Locard, 1883)
• † Anisus guerichi (Andreae, 1902)
• † Anisus hilgendorfi (Fraas, 1868)
• Anisus issykulensis (Clessin, 1907)
• † Anisus mariae (Michaud, 1862)
• † Anisus matheroni (Fischer & Tournouër, 1873)
• † Anisus metochiensis Milošević, 1976
• Anisus natalensis (Krauss)^[7]
• † Anisus rousianus (Noulet, 1854)
• 旋多旋螺 Anisus vortex (Linnaeus, 1758)^[6]

Subspecies and species brought into synonymy

• Subgenus Anisus (Gyraulus) Agassiz in Charpentier, 1837: synonym of Gyraulus Charpentier, 1837
• Subgenus † Anisus (Odontogyrorbis) Lörenthey, 1906: synonym of Anisus (Anisus) Studer, 1820
• Subgenus Anisus (Spiralina) Martens, 1899: synonym of Anisus Studer, 1820
• † Anisus angustigyratus (Sauerzopf, 1953): synonym of † Anisus (Anisus) krambergeri (Halaváts, 1903)
• † Anisus dupuyanus (Noulet, 1854): synonym of † Anisus dupuyianus (Noulet, 1854)
• Anisus septemgyratus auct. (not Rossmässler):^[6] synonym of Anisus calculiformis (Sandberger, 1874)
• Anisus tokyoensis Mori, 1938: synonym of Gyraulus tokyoensis (Mori, 1938)

• subgenus Disculifer C. Boettger, 1944