| Gastropods, Molluscs, Neotricula aperta, Tricula, Rissooidea|
Pomatiopsidae is a family of small, mainly freshwater snails, (some also occur in other habitats) that have gills and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
Pomatiopsidae are well known as intermediate hosts of Asian schistosomes.
Species in the family Pomatiopsidae occur worldwide. The generic diversity of Pomatiopsinae is particularly high in the Japanese Archipelago, where four of the eight genera, including two endemics, are recorded. The subfamily Triculinae radiated as aquatic snails in freshwater habitats in Southeast Asia.
The American malacologist William Stimpson first defined this taxon as Pomatiopsinae in 1865. Stimpson's diagnosis reads as follows:
The family Pomatiopsidae consists of 2 subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005) that follows classification by Davis (1979):Subfamily Pomatiopsinae Stimpson, 1865 - synonyms: Hemibiinae Heude, 1890; Tomichiinae Wenz, 1938; Coxiellidae Iredale, 1943; Oncomelaniidae Salisbury & Edwards, 1961; Cecininae Starobogatov, 1983
Subfamily Triculinae Annandale, 1924tribe Triculuni Annandale, 1924 - synonym: Delavayidae Annandale, 1924
tribe Jullieniini Davis, 1979
tribe Lacunopsini Davis, 1979
tribe Pachydrobiini Davis & Kang, 1990
Family-group name Rehderiellinae Brandt, 1974 is also in Pomatiopsidae, but it is not allocated in detail.
Genera within the family Pomatiopsidae include:Spiripockia Simone, 2012 (not allocated to a subfamily)
Subfamily PomatiopsinaeBlanfordia Adams, 1863
Cecina A. Adams, 1861
Coxiella E. A. Smith, 1894
Fukuia Abbott & Hunter, 1949
Hemibia Heude, 1890
Idiopyrgus Pilsbry, 1911 - synonym: Aquidauania Davis, 1979
Oncomelania Gredler, 1881
Pomatiopsis Tryon, 1862 - the type genus of the family Pomatiopsidae
Tomichia Benson, 1851
Subfamily Triculinae - there are over 20 genera in Triculinae
tribe TriculuniDelavaya Heude, 1889
Fenouilia Heude, 1889
Lithoglyphopsis Thiele, 1928
Tricula Benson, 1843 - type genus of the tribe Triculuni
tribe JullieniiniHubendickia Brandt, 1968
Hydrorissoia Bavay, 1895
Jullienia Crosse & P. Fischer, 1876 - type genus of the tribe Jullieniini
Karelainia Davis, 1979
Kunmingia Davis & Kuo in Davis, 1981
Neoprososthenia Davis & Kuo in Davis, Kuo, Hoagland, Chen, Yang & Chen, 1984
Pachydrobiella Thiele, 1928 - with the only species Pachydrobiella brevis (Bavay, 1895)
† Paraprososthenia Annandale, 1919
Saduniella Brandt, 1970 - with the only species Saduniella planispira Brandt, 1970
tribe LacunopsiniLacunopsis Deshayes, 1876 - type genus of the tribe Lacunopsini
tribe PachydrobiiniGammatricula Davis & Liu in Davis, Liu & Chen, 1990
Halewisia Davis, 1979 - with the only species Halewisia expansa (Brandt, 1970)
Jinghongia Davis in Davis & Kang, 1990
Neotricula Davis in Davis, Subba Rao & Hoagland, 1986
Pachydrobia Crosse & P. Fischer, 1876 - type genus of the tribe Pachydrobiini
Robertsiella Davis & Greer, 1980
Wuconchona Kang, 1983
Rehderiellinae is not allocated to a subfamilyRehderiella Brandt, 1974 - type genus of the taxon Rehderiellinae
The Pomatiopsidae have various life habits: aquatic, amphibious, littoral, halophilic, cavernicolous and even terrestrial. Terrestrial taxa occur only on the Japanese Archipelago located in East Asia (Blanfordia). Tomichia and Coxiella include several halophilic species occurring on saline lakes.
Pomatiopsidae invaded freshwater habitats from marine ones in one or in two independent lineages. They also invaded terrestrial habitats from freshwater habitats in two independent lineages.