62 Species in Family Lymnaeidae
| Scientific Name | Author | English Name |
|---|---|---|
| Acella haldemani | (Binney, 1867) | Spindle lymnaea |
| Bulimnaea megasoma | (Say, 1824) | Mammoth lymnaea |
| Fisherola nuttalli | (Haldeman, 1841) | Shortface lanx |
| Fossaria alberta | Baker, 1919 | |
| Fossaria bulimoides | (Lea, 1841) | Prairie fossaria |
| Fossaria cockerelli | Pilsbry & Ferriss, 1906 | |
| Fossaria cubensis | (Pfeiffer, 1839) | Carib fossaria |
| Fossaria cyclostoma | (Walker, 1808) | Bugle fossaria |
| Fossaria dalli | (Baker, 1907) | Dusky fossaria |
| Fossaria exigua | (Lea, 1841) | |
| Fossaria galbana | (Say, 1825) | Boreal fossaria |
| Fossaria hendersoni | Baker, 1909 | |
| Fossaria humilis | (Say, 1822) | Marsh fossaria |
| Fossaria modicella | (Say, 1825) | Rock fossaria |
| Fossaria obrussa | (Say, 1825) | Golden fossaria |
| Fossaria parva | (Lea, 1841) | Pygmy fossaria |
| Fossaria peninsulae | (Walker, 1908) | |
| Fossaria perplexa | Baker & Henderson, 1929 | |
| Fossaria perpolita | (Dall, 1905) | Glossy fossaria |
| Fossaria rustica | (Lea, 1841) | |
| Fossaria sonomaensis | Hemphill, 1906 | Sonoma fossaria |
| Fossaria tazewelliana | (Wolf, 1869) | Tazwell fossaria |
| Fossaria techella | (Haldeman, 1867) | |
| Fossaria truncatula | (Müller, 1774) | Attenuate fossaria |
| Fossaria vancouverensis | Baker, 1939 | |
| Fossaria viatrix | (Orbigny, 1835) | |
| Lanx alta | (Tryon, 1865) | Highcap lanx |
| Lanx klamathensis | Hannibal, 1912 | Scale lanx |
| Lanx patelloides | (Lea, 1856) | Kneecap lanx |
| Lanx subrotunda | (Tryon, 1865) | Rotund lanx |
| Lymnaea atkaensis | Dall, 1884 | Frigid lymnaea |
| Lymnaea columella | unspecified | |
| Lymnaea cousini | Jousseaume, 1887 | |
| Lymnaea palustris | unspecified | |
| Lymnaea peregra | unspecified | |
| Lymnaea stagnalis | (Linnaeus, 1758) | Swamp lymnaea |
| Pseudosuccinea columella | (Say, 1817) | Mimic lymnaea |
| Radix auricularia | (Linnaeus, 1758) | Big-eared radix |
| Stagnicola apicina | (Lea, 1838) | Abbreviate pondsnail |
| Stagnicola arctica | (Lea, 1864) | Arctic pondsnail |
| Stagnicola bonnevillensis | (Call, 1884) | Fat-whorled pondsnail |
| Stagnicola caperata | (Say, 1829) | Wrinkled marshsnail |
| Stagnicola catescopium | (Say, 1867) | Woodland pondsnail |
| Stagnicola contracta | (Currier, 1881) | Deepwater pondsnail |
| Stagnicola elodes | (Say, 1821) | Marsh pondsnail |
| Stagnicola elrodi | (Baker & Henderson, 1933) | Flathead pondsnail |
| Stagnicola elrodiana | Baker, 1935 | Longmouth pondsnail |
| Stagnicola emarginata | (Say, 1821) | St. Lawrence pondsnail |
| Stagnicola exilis | (Lea, 1834) | Flat-whorled pondsnail |
| Stagnicola gabbi | (Tryon, 1865) | Striate pondsnail |
| Stagnicola hinkleyi | (Baker, 1906) | Rustic pondsnail |
| Stagnicola idahoensis | (Henderson, 1931) | Shortspire pondsnail |
| Stagnicola mighelsi | (Binney, 1865) | Bigmouth pondsnail |
| Stagnicola montanensis | (Baker, 1913) | Mountain marshsnail |
| Stagnicola neopalustris | (Baker, 1911) | Piedmont pondsnail |
| Stagnicola oronoensis | (Baker, 1904) | Obese pondsnail |
| Stagnicola petoskeyensis | (Walker, 1908) | Petoskey pondsnail |
| Stagnicola pilsbryi | (Hemphill, 1890) | Fish springs marshsnail |
| Stagnicola traski | (Tryon, 1863) | Widelip pondsnail |
| Stagnicola utahensis | (Call, 1884) | Thickshell pondsnail |
| Stagnicola walkeriana | Baker, 1926 | Calabash pondsnail |
| Stagnicola woodruffi | (Baker, 1901) | Coldwater pondsnail |