Achatina schinziana Mousson, 1888 (additional source)
Balea nitida Mousson, 1858 (identification resource)
Batissa tenebrosa var. parallela Mousson, 1865 accepted as Batissa tenebrosa (Hinds, 1842) (identification resource)
Bythinia ejecta Mousson, 1874 accepted as Bithynia ejecta Mousson, 1874 (identification resource)
Cassidula crassiuscula Mousson, 1869 (identification resource)
Castalia ecarinata Mousson, 1869 (identification resource)
Helicina durangoana Mousson, 1884 (identification resource)
Helicina vitiensis var. interposita Mousson, 1865 (identification resource)
Helix (Hemicycla) desculpta Mousson, 1872 † accepted as Hemicycla desculpta (Mousson, 1872) † (identification resource)
Helix (Iberus) merita Mousson, 1872 † accepted as Hemicycla merita (Mousson, 1872) † (identification resource)
Helix (Leptaxis) digna Mousson, 1872 † accepted as Hemicycla digna (Mousson, 1872) † (identification resource)
Helix borealis Mousson, 1859 (identification resource)
Helix pathetica Mousson, 1854 (identification resource)
Helix pomacella Mousson, 1854 (identification resource)
Helix striata var. jonica Mousson, 1854 accepted as Cernuella jonica (Mousson, 1854) (identification resource)
Melampus ornatus Mousson, 1871 (identification resource)
Melampus tongaensis var. pallidula Mousson, 1871 accepted as Melampus tongaensis Mousson, 1871 (identification resource)
Melanopsis mingrelica Mousson, 1863 (identification resource)
Neritina iris Mousson, 1849 (identification resource)
Omphalotropis bifilaris Mousson, 1865 (identification resource)
Omphalotropis bilirata Mousson, 1865 (identification resource)
Omphalotropis conoidea Mousson, 1865 (identification resource)
Omphalotropis ovata Mousson, 1865 (identification resource)
Omphalotropis parva Mousson, 1865 (identification resource)
Omphalotropis perforata Mousson, 1865 (identification resource)
Partula lirata Mousson, 1865 (identification resource)
Planorbis janinensis Mousson, 1859 accepted as Gyraulus janinensis (Mousson, 1859) (identification resource)
Pupa (Gibbulina) macrogira Mousson, 1872 † accepted as Gibbulinella macrogira (Mousson, 1872) † (identification resource)
Pythia tortuosa var. infidelis Mousson, 1871 (identification resource)
Rhodea gigantea Mousson, 1873 (identification resource)
Succinea insularis Mousson, 1887 (original description)
Vitrina latebasis Mousson, 1872 accepted as Insulivitrina blauneri (Shuttleworth, 1852) (identification resource)