Article · Wikipedia archive · Last revised Jun 28, 2026

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.

Last revised
Jun 28, 2026
Read time
≈ 3 min
Length
703 w
Citations
9
Source
Wikipedia ↗
Anisus
Shells of Anisus vorticulus
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superorder: Hygrophila
Family: Planorbidae
Subfamily: Planorbinae
Tribe: Planorbini
Genus: Anisus
H. Studer, 18201
Synonyms2
List
  • Anisus (Anisus) S. Studer, 1820; accepted, alternate representation
  • Anisus (Costorbis) Lindholm, 1926; accepted, alternate representation
  • Anisus (Disculifer) C. R. Boettger, 1944; accepted, alternate representation
  • † Anisus (Odontogyrorbis) Lörenthey, 1906; (junior synonym)
  • † Anisus (Pseudocarinogyraulus) Popova & Starobogatov, 1970; accepted, alternate representation
  • Anisus (Spiralina) Martens, 1899; (junior homonym of Spiralina Chaster, 1898; junior synonym)
  • Anisus (Vorticulus) Prozorova & Starobogatov, 1997; (junior subjective synonym)
  • † Odontogyrorbis Lörenthey, 1906; (junior subjective synonym)
  • Paraspira Dall, 1905; (junior subjective synonym)
  • † Paraspira (Odontogyrorbis) Lörenthey, 1906; (junior synonym)
  • Paraspira (Paraspira) Dall, 1905; (junior synonym)
  • Planorbis (Anisus) Studer, 1820; (original name)
  • Planorbis (Costorbis) Lindholm, 1926; (original rank)
  • Planorbis (Diplodiscus) Westerlund, 1897; (junior homonym of Diplodiscus Diesing, 1835)
  • † Planorbis (Odontogyrorbis) Lörenthey, 1906; (junior synonym)
  • Planorbis (Spiralina) von Martens, 1899; (junior homonym of Spiralina Chaster, 1898)
  • Planorbis (Rotundatusiana) Germain, 1903; (junior synonym)
  • Planorbis (Spiralina) E. von Martens, 1899; (junior homonym of Spiralina Chaster, 1898)
  • Planorbis (Spirorbis) Swainson, 1840; (junior homonym of Spirorbis Daudin, 1800 [Polychaeta]; junior synonym)
  • † Pseudocarinogyraulus Popova & Starobogatov, 1970; (superseded rank)
  • Spiralina Martens, 1899 (junior homonym of Spiralina Chaster, 1898; junior synonym)
  • Spirulina; (misspelling)

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.2

Species

The genus contains the following species:2

Extant
Extinct
  • † Anisus altaicus Popova & Starobogatov, 1970
  • † Anisus angulatus (Clessin, 1877)
  • † Anisus arltungae McMichael, 1968
  • † Anisus balizacensis (Peyrot, 1932)
  • † Anisus bicarinatus Szőts, 1953
  • † Anisus brunnensis (Sauerzopf, 1953)
  • † Anisus coislinensis (Sauerzopf, 1953)
  • † Anisus confusus Soós, 1934
  • † Anisus densecostatus Schütt, 1994
  • † Anisus deviatkini Popova & Starobogatov, 1970
  • † Anisus dupuyianus (Noulet, 1854)
  • † Anisus falsani (Locard, 1883)
  • † Anisus guerichi (Andreae, 1902)
  • † Anisus gulmargensis Bhatia, 1975
  • † Anisus hilgendorfi (Fraas, 1868)
  • † Anisus karkaraensis (Schlosser, 1906)
  • † Anisus komarovae Prysjazhnjuk, 1974
  • † Anisus krambergeri (Halaváts, 1903)
  • † Anisus laskarevi Milošević, 1976
  • † Anisus lentiformis Popova & Starobogatov, 1970
  • † Anisus lungershauseni Popva & Starobogatov, 1970
  • † Anisus mariae (Michaud, 1862)
  • † Anisus metochiensis Milošević, 1976
  • † Anisus nechoroshevi Popova & Starobogatov, 1970
  • † Anisus omalus (Bourguignat, 1881)
  • † Anisus paritus Y.-T. Li, 1986
  • † Anisus pseudoplanulatus Szőts, 1953
  • † Anisus pseudosubangulatus Szőts, 1953
  • † Anisus racovetzae Popova & Starobogatov, 1970
  • † Anisus ressmanianus (Westerlund, 1875)
  • † Anisus rousianus (Noulet, 1854)
  • † Anisus saddaritanus (Pallary, 1901)
  • † Anisus septemgyratiformis (Gottschick, 1911)
  • † Anisus subanguloides H.-J. Wang, 1982
  • † Anisus thomasi (Pallary, 1901)
  • † Anisus trapeziiformis Popova & Starobogatov, 1970
  • † Anisus tuerykensis Popova & Starobogatov, 1970
  • † Anisus vorticoides (Martinson, 1954)
  • † Anisus weizhouensis H.-J. Wang, 1982
Uncertain (Taxon Inqurendum)
  • Anisus dietmari Schütt, 1973
  • Anisus issykulensis (Clessin, 1907)
  • Anisus calculiformis (Sandberger, 1874)
Subspecies and species brought into synonymy (Selection)
  • Subgenus Anisus (Gyraulus) Agassiz in Charpentier, 1837: synonym of Gyraulus Charpentier, 1837
  • Anisus (Gyraulus) terekholicus Prozorova & Starobogato, 1997: synonym of Gyraulus terekholicus (Prozorova & Starobogatov, 1997)
  • 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):3 synonym of Anisus calculiformis (Sandberger, 1874)
  • Anisus tokyoensis Mori, 1938: synonym of Gyraulus tokyoensis (Mori, 1938)
References

References

  1. (in German) Studer S. (1820). "Kurzes Verzeichniss der bis jetzt in unserm Vaterlande entdeckten Conchylien". Naturwissenschaftlicher Anzeiger der Allgemeinen Schweizerischen Gesellschaft für die Gesammten Naturwissenschaften 3(11): 83-90, 91-94. Bern.
  2. Neubert, Eike (2020). "Anisus S. Studer, 1820". WoRMS. World Register of Marine Species. Retrieved 7 August 2025.
  3. Glöer, P. 2002 Die Süßwassergastropoden Nord- und Mitteleuropas. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., ISBN 3-925919-60-0, page 254-263.
External links
  • Media related to Anisus at Wikimedia Commons