Hygrophila
Family: Lymnaeidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Erinna aulacospira | (Ancey, 1889) | - | - | Hawaiian Islands, USA | Rediscovered | Access |
| Galba cyclostoma | (Walker, 1908) | Bugle fossaria | ? | Michigan & New York, USA | Missing | Access |
| Galba perpolita | (Dall, 1905) | Glossy fossaria | 1905 or before | Nushagak, Bristol Bay, Alaska (southwestern), USA | Missing | Access |
| Galba tazewelliana | (Wolf, 1869 or 1870) | Tazwell’s fossaria | ? | Illinois & Iowa, USA | Missing | Access |
| Galba vancouverensis | (Baker, 1939) | Vancouver fossaria | ? | Vancouver Island (southern), British Columbia, Canada & San Juan Islands, Washington (extreme northwest), USA | Extinct | Access |
| Lantzia carinata | Jousseaume, 1872 | - | 1992 or later | Réunion, Mascarene Islands | Missing | Access |
| Lymnaea plicata | Hylton Scott 1953 | - | ? | Argentina | Missing | Access |
| Lymnaea tomentosa hamiltoni | Cumber, 1941 | - | subfossil | Pyramid Valley, South Island, New Zealand | Missing | Access |
| Stagnicola neopalustris | Baker, 1911 | Piedmont pondsnail | ? | Virginia, USA | Missing | Access |
| Stagnicola petoskeyensis | (Walker, 1908) | Petoskey pondsnail | ? | Michigan, USA | Missing | Access |
| Stagnicola pilsbryi | Hemphill, 1890 | Fish Springs marshsnail, Fish Springs pond snail | 1968 | Fish Spring, Juab County, Utah, USA | Extinct | Access |
| Stagnicola utahensis | Call, 1884 | Thickshell pond snail, Bonneville stagnicola, Utah ribbed snail | ? | Utah, USA | Missing | Access |
Family: Physidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Archiphysa ashmuni | Taylor, 2003 | - | ? | San Rafael, Cibola County, New Mexico, USA | Missing | Access |
| Archiphysa sonomae | Taylor, 2003 | - | ? | Sonoma County, California, USA | Missing | Access |
| Physa mirollii | Taylor, 2003 | - | ? | Maggiore, Italy | Missing | Access |
| Physa mosambiquensis | (Clessin, 1886) | - | ? | Mozambique | Invalid (synonym) | Access |
| Physella hemphilli | Taylor, 2003 | Coeur d’Alene physa | - | Coeur D’Alene Lake, Idaho, USA | Rediscovered | Access |
| Physella microstriata | (Chamberlain & Berry, 1930) | Fish Lake physa | ? | Utah, USA | Extinct | Access |
Family: Planorbidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Amphigyra alabamensis | Pilsbry, 1906 | Shoal sprite | ? | Alabama, USA | Extinct | Access |
| Ancylastrum cumingianus | Bourguignat, 1853 | Great Lakes giant limpet, Australian freshwater limpet, Tasmanian freshwater limpet, Tasmanian freshwater 'limpet' | (rediscovered) | Great Lake, Lake St Clair and other lakes, Central Plateau, Tasmania, Australia | Rediscovered | Access |
|
Ancylus milleri |
Dohrn, 1869 | - | (rediscovered) | Santiago, Cape Verde Islands, Macaronesia | Rediscovered if valid | Access |
| Ceratophallus concavus | (Mandahl-Bath, 1954) | - | early 1950's | Uganda | Missing | Access |
| Ceratophallus socotrensis | (Godwin-Austen, 1883) | - | 1883 or before | Socotra Island, Republic of Yemen | Missing | Access |
| Ceratophallus subtilis | (Mandahl-Barth, 1954) | - | 1951 | Kenya & Uganda | Missing | Access |
| Glyptophysa oconnori | Cumber, 1941 | - | subfossil | Pyramid Valley, South Island, New Zealand | Missing | Access |
| Gyraulus sp. nov. 'California' | - | - | Late Pleistocene | California, USA | Missing | Access |
| Helisoma eucosmium | (Bartsch, 1908) | - | - | North Carolina (southeastern), USA | Rediscovered | Access |
| Miratesta celebensis | P. & F. Sarasin, 1898 | - | - | Lake Posos, Sulawesi, Indonesia | Rediscovered | Access |
| Neoplanorbis carinatus | Walker, 1908 | - | ? | Alabama, USA | Extinct | Access |
| Neoplanorbis smithi | Walker, 1908 | Angled flat-top snail | ? | Alabama, USA | Extinct | Access |
| Neoplanorbis tantillus | Pilsbry, 1906 | Little flat-top snail | ? | Alabama, USA | Extinct | Access |
| Neoplanorbis umbilicatus | Walker, 1908 | Umbilicate flat-top snail | ? | Alabama, USA | Extinct | Access |
| Planorbella columbiensis | (F.C. Baker, 1945) | - | 1945 | Lac La Hache, British Columbia (central), Canada | Missing | Access |
| Planorbella magnifica | (Pilsbry, 1903) | Magnificent ramshorn | ? | North Carolina, USA | Missing | Access |
| Planorbella multivolvis | Case, 1847 | Acorn ramshorn | ? | Michigan, USA | Extinct | Access |
| Planorbella traskii | I. Lea, 1856 | - | ? | California, USA | Missing | Access |
| Rhodacmea filosa | Conrad, 1834 | Wicker ancylid | - | Alabama, USA | Rediscovered | Access |
| Rhodacmea hinkleyi | (Walker, 1908) | Knobby ancylid | Alabama, Illinois, Indiana & Tennessee, USA | Missing | Access | |
| Vorticifex neritoides | Baker, 1945 | - | 1988 | Oregon & Washington, USA | Missing | Access |
| Vorticifex solida | Dall, 1870 | - | ? | California & Nevada, USA | Missing | Access |