Melanopsis genus of freshwater snails with a gill and an operculum , aquatic gastropod mollusks in the family Melanopsidae.
The genus first appeared in the Cretaceous.
Melanopsis is the type genus of the family Melanopsidae.
These snails are found in southern Europe , North Africa , Asia Minor, New Caledonia and New Zealand .
Their shells are ovate, with a short spire , and a large elongated body whorl . The outer lip of the aperture is thin, but the inner lip has a smooth parietal callus , thickened into a pad over the parietal wall.
Species within the genus Melanopsis include:
(Extinct taxa indicated by a dagger, †.)
Species brought into synonymy † Melanopsis abbreviata cosmanni Pallary, 1916: synonym of † Melanopsis abbreviata cossmanni Pallary, 1916 † Melanopsis acanthicoides var. abichi Calvert & Neumayr, 1880: synonym of † Melanopsis abichi Calvert & Neumayr, 1880 † Melanopsis acanthicoides var. pergamenica Calvert & Neumayr, 1880: synonym of † Melanopsis pergamena Calvert & Neumayr, 1880 † Melanopsis acanthicoides var. trojana Hoernes, 1877: synonym of † Melanopsis trojana Hoernes, 1877 Melanopsis aperta Gassies, 1863: synonym of Melanopsis frustulum Morelet, 1857Melanopsis aurantiaca Gassies, 1874: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis austriaca var. serbica Brusina, 1902: synonym of † Melanopsis haueri ripanjensis Neubauer, Harzhauser, Kroh, Georgopoulou & Mandic, 2014 Melanopsis brevis Morelet, 1857: synonym of Melanopsis frustulum Morelet, 1857Melanopsis brotiana Gassies, 1874: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis callosa var. curta Locard, 1893: synonym of † Melanopsis kleinii kleinii Kurr, 1856 Melanopsis carinata Gassies, 1863: synonym of Melanopsis frustulum Morelet, 1857Melanopsis curta Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis cylindrica petrovici (Brusina, 1893): synonym of † Melanopsis petrovici Brusina, 1893 Melanopsis dumbeensis Crosse, 1869: synonym of Melanopsis frustulum Morelet, 1857Melanopsis elegans Gassies, 1869: synonym of Melanopsis frustulum Morelet, 1857Melanopsis elongata Gassies, 1874: synonym of Melanopsis frustulum Morelet, 1857Melanopsis esperi Férussac, 1823: synonym of Esperiana esperi Melanopsis fasciata Gassies, 1874: synonym of Melanopsis frustulum Morelet, 1857Melanopsis fragilis Gassies, 1874: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis fossilis var. accedens Handmann, 1887: synonym of † Melanopsis fossilis (Gmelin, 1791) † Melanopsis fossilis var. propinqua Handmann, 1887: synonym of † Melanopsis fossilis (Gmelin, 1791) † Melanopsis fossilis var. proclivis Handmann, 1887: synonym of † Melanopsis fossilis (Gmelin, 1791) † Melanopsis fossilis rugosa Handmann, 1887: synonym of † Melanopsis wolfgangfischeri Neubauer, Harzhauser, Kroh, Georgopoulou & Mandic, 2014 Melanopsis fulgurans Gassies, 1859: synonym of Melanopsis frustulum Morelet, 1857Melanopsis fulminata Brot, 1879: synonym of Melanopsis frustulum Morelet, 1857Melanopsis fusca Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857Melanopsis fusiformis Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857Melanopsis gassiesiana Crosse, 1867: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis harpula capreniensis Fontannes, 1887: synonym of † Melanopsis capreniensis Fontannes, 1887 † Melanopsis impressa bonellii Manzoni, 1870: synonym of † Melanopsis bonellii Manzoni, 1870 Melanopsis lamberti Souverbie, 1872: synonym of Melanopsis mariei Crosse, 1869Melanopsis lentiginosa Reeve, 1860: synonym of Melanopsis frustulum Morelet, 1857Melanopsis lineolata Gassies, 1857: synonym of Melanopsis frustulum Morelet, 1857Melanopsis lirata Gassies, 1869: synonym of Melanopsis frustulum Morelet, 1857Melanopsis livida Gassies, 1863: synonym of Melanopsis frustulum Morelet, 1857Melanopsis neritoides Gassies, 1859: synonym of Melanopsis frustulum Morelet, 1857Melanopsis retoutiana Gassies, 1863: synonym of Melanopsis frustulum Morelet, 1857Melanopsis robusta Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis rumana var. correcta Stefanescu, 1896: synonym of † Melanopsis correcta Stefanescu, 1896 † Melanopsis sandbergeri correcta Stefanescu, 1896: synonym of † Melanopsis correcta Stefanescu, 1896 Melanopsis souverbieana Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857Melanopsis trifasciata Gray, 1843: synonym of Zemelanopsis trifasciata (Gray, 1843)Melanopsis variegata Morelet, 1857: synonym of Melanopsis frustulum Morelet, 1857Melanopsis zonites Gassies, 1870: synonym of Melanopsis frustulum Morelet, 1857† Melanopsis (Canthidomus) bouei var. megacantha Handmann, 1887: synonym of † Melanopsis bouei megacantha Handmann, 1887 † Melanopsis (Canthidomus) bouei var. monacantha Handmann, 1887: synonym of † Melanopsis bouei bouei Férussac, 1823 † Melanopsis (Canthidomus) bouei var. multicostata Handmann, 1887: synonym of † Melanopsis bouei multicostata Handmann, 1887 † Melanopsis (Canthidomus) defensa elongata Gillet & Marinescu, 1971: synonym of † Melanopsis defensa defensa Fuchs, 1870 
