Clithon

Clithon is a genus of freshwater snails or brackish snails that have an operculum, aquatic gastropod molluscs in the family Neritidae, the nerites.

Distribution
Distribution of the genus Clithon includes the Comoro Islands (3 species), Madagascar (3 or more species) and the Mascarene Islands.

Description
Some species, such as Clithon coronatum have spines on its shell.

Species
Species in the genus Clithon include:
 * Clithon angulosum (Récluz, 1843)
 * Clithon aspersum (G. B. Sowerby II, 1849)
 * † Clithon avellana (Récluz, 1842)
 * Clithon barbei Symonds & Pacaud, 2010 †
 * † Clithon bezieri (Dalimier, 1918)
 * Clithon bicolor (Récluz, 1843)
 * † Clithon bouryi (Cossmann, 1888)
 * † Clithon bristowi (Wenz, 1929)
 * Clithon castanea (Hombron & Jacquinot, 1848)
 * Clithon celatum (Récluz, 1846)
 * Clithon chlorostoma (G.B. Sowerby I, 1833)
 * Clithon circumvolutum (Récluz, 1843)
 * † Clithon coeuvrense Vrinat, 2019
 * † Clithon concavum (J. Sowerby, 1823)
 * Clithon corona (Linnaeus, 1758)
 * Clithon coronatum (Leach, 1815)
 * † Clithon cranmorense Symonds, 2006
 * Clithon cryptum Eichhorst, 2016
 * Clithon cuvieriana
 * Clithon diadema (Récluz, 1841)
 * Clithon dispar (Pease, 1868)
 * Clithon dominguense (Lamarck, 1822)
 * Clithon donovani (Récluz, 1843)
 * Clithon dringii (Récluz, 1846)
 * Clithon elegans (Deshayes, 1824) †
 * Clithon eudeli (G. B. Sowerby III, 1917)
 * Clithon faba G. B. Sowerby I, 1836
 * Clithon flavovirens (von dem Busch, 1843)
 * Clithon francoisi (Mabille, 1895)
 * Clithon fuliginosum (von dem Busch, 1843)
 * † Clithon hillae ' Symonds, 2015 †
 * † Clithon inequidentatum (Récluz, 1850)
 * Clithon leachii (Récluz, 1841)
 * Clithon lentiginosum (Reeve, 1855)
 * Clithon luctuosum (Récluz, 1841)
 * Clithon madecassinum (Morelet, 1860)
 * Clithon mertonianum (Récluz, 1843)
 * Clithon michaudi (Récluz, 1841)
 * † Clithon mortoni Symonds, 2015
 * Clithon nigrispinis Lesson, 1831
 * Clithon nouletianus (Gassies, 1863)
 * Clithon nucleolus (Morelet, 1857)
 * †Clithon nucleus (Deshayes, 1832)
 * † Clithon occultatum Vrinat, 2019
 * Clithon olivaceum (Récluz, 1843)
 * Clithon oualaniense (Lesson, 1831)
 * Clithon parvulum (Le Guillou, 1841)
 * † Clithon passyanum (Deshayes, 1864)
 * Clithon peguense (Blanford, 1867)
 * † Clithon pisiforme (Férussac, 1823)
 * † Clithon planulatum (F. E. Edwards in Lowry, 1866)
 * † Clithon pococki Symonds, 2015
 * Clithon pritchardi (Dohrn, 1861)
 * Clithon pulchellum (Récluz, 1843)
 * Clithon rarispina (Mousson, 1849)
 * Clithon recluzianum (Le Guillou, 1841)
 * Clithon reticulare (G. B. Sowerby I, 1836)
 * Clithon retropictum (von Martens, 1879)
 * Clithon rugatum (Récluz, 1842)
 * Clithon ruginosum (Récluz, 1841)
 * † Clithon saincenyense (Deshayes, 1864)
 * † Clithon sobrinum (A. Férussac, 1823)
 * Clithon souleyetanum (Récluz, 1842)
 * Clithon sowerbianum (Récluz, 1843)
 * Clithon spiniferum (Récluz, 1842)
 * Clithon spinosum (G. B. Sowerby I, 1825) - synonyms: Clithon spinosus, Clithon spinosa
 * Clithon squarrosum (Récluz, 1843)
 * † Clithon stintoni Symonds, 2009
 * Clithon subgranosum (G. B. Sowerby I, 1836)
 * Clithon subpunctatum (Récluz, 1843)
 * Clithon teres Eichhorst, 2016
 * Clithon thermophilum (Martens, 1878)
 * † Clithon tigrinum Vrinat, 2019 †
 * † Clithon transbaicalicus Popova, 1981
 * Clithon triseriale (G. B. Sowerby I, 1836) (taxon inquirendum)
 * Clithon tritonense (Le Guillou, 1841) (taxon inquirendum)
 * Clithon undatus Lesson, 1831
 * Clithon wallacei (Dohrn, 1861)
 * † Clithon waltoni (Symonds, 2002)
 * † Clithon zonarium (Deshayes, 1832)


 * Species brought into synonymy:
 * Clithon exclamationis (Mabille, 1895) : synonym of Clithon bicolor (Récluz, 1843)
 * Clithon glabratum (G.B. Sowerby II, 1849) : synonym of Vitta glabrata (G. B. Sowerby II, 1849)
 * Clithon longispina (Récluz, 1841) : synonym of Clithon coronatum (Leach, 1815) (junior synonym)

Ecology
It lives in rapid streams.