Classification of Kittle and Portell 2010

Cl. Gastropoda Cuvier 1795 [snail]
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Fm. Polygyridae Pilsbry 1895
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G. Daedalochila Beck 1837
G. Polygyra Say 1818
Fm. Spiraxidae Baker 1939
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G. Euglandina Crosse and Fischer 1870
G. Niveria Jousseaume 1884
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Niveria suffosa Gray 1827
Fm. Ampullariidae Gray 1824 [apple snail]
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G. Pomacea Perry 1811
Fm. Gastrochaenidae Gray 1840
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G. Lamychaena Freneix 1979
Fm. Hydrobiidae Troschel 1857
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G. Tyronia Stimpson 1865
Fm. Planorbidae Rafinesque 1815
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G. Biomphalaria Preston 1910
G. Micromenetus Baker 1945
Fm. Sphaeriidae Deshayes 1855
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G. Musculium Link 1807
Fm. Lymnaeidae Rafinesque 1815
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G. Pseudosuccinea Say 1817
Fm. Physidae Fitzinger 1833
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G. Physella Haldeman 1849
Fm. †Ancylidae
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G. Ferrissia Walker 1903
G. Hebetoncylus Pilsbry 1914
G. Laevapex Walker 1903
Fm. Zonitidae Mörch 1864 [true glass snail]
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G. Glyphyalinia Martens 1892
G. Nesovitrea Cooke 1921
G. Zonitoides Lehmann 1862