Orthalicoidei
Family: Amphibulimidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Plekocheilus euryomphalus | (Jonas, 1844) | ? | Venezuela | Missing | Access | |
| Plekocheilus pulicarius | (Reeve, 1848) | ? | Colombia | Missing | Access | |
| Plekocheilus sinuatus | (Albers, 1854) | ? | Venezuela | Missing | Access | |
| Plekocheilus succinoides | (Petit, 1840) | ? | Colombia | Missing | Access |
Family: Bothriembryontidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bothriembryon praecelsus | Iredale, 1939 | Kellerberin land snail | pre-1940 | “Kellerberrin”, Western Australia, Australia | Extinct | Access |
| Bothriembryon whitleyi | Iredale, 1939 | Geraldton land snail | pre-1940? | "Geraldton", Western Australia, Australia | Extinct | Access |
| Placostylus ambagiosus gardneri | Powell, 1951 | ? | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus hinemoa | Powell, 1947 | ? | North Island, New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus lesleyae | Powell, 1947 | ? | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus priscus | Powell, 1938 | ? | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus spiritus | Powell, 1947 | ? | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus worthyi | Powell, 1947 | ? | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus ssp. nov. ‘Herangi Hill’ | - | early 1960's | New Zealand | Invalid (synonym) | Access | |
| Placostylus ambagiosus ssp. nov. 'Kohuronaki' | - | 1990's? | New Zealand | Invalid (synonym) | Access | |
| Placostylus bivaricosus etheridgei | Hedley, 1891 | Lord Howe flax snail, Lord Howe placostylus | "several decades [ago]" | Lord Howe Island, Australia | Extinct | Access |
| Placostylus bivaricosus solidus | Brazier in Etheridge, 1889 | Lord Howe flax snail, Lord Howe placostylus | ? | Lord Howe Island, New South Wales, Australia | Extinct? | Access |
| Placostylus bivaricosus ssp. nov. 'Mount Gower' | - | ? | Lord Howe Island, New South Wales, Australia | Extinct? | Access | |
| Placostylus cuniculinsulae | (Cox, 1872) | Lord Howe flax snail, Lord Howe placostylus | pre-1901 | Blackburn (=Rabbit) Island, in the lagoon of Lord Howe Island, New South Wales, Australia | Extinct or invalid (synonym) | Access |
| Placostylus garretti | Pilsbry, 1900 | Flax shell | 1900 or before | Fiji? | Extinct? | Access |
| Placostylus koroensis | (Garrett, 1872) | Flax snail | 1980 | Fiji | Missing | Access |
| Placostylus subroseus | Fulton, 1915 | Flax snail | 1915 or before | Fiji | Extinct? | Access |
Family: Bulimulidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Bostryx voithianus | (Pfeiffer, 1847) | - | - | Chile (northern) | Rediscovered | Access |
| Bulimulus brunoi | von Ihering, 1917 | ? | Trindade Island, Brazil | Missing | Access | |
| Bulimulus duncanus | Dall, 1893 | ? | Pinzón, Galápagos Islands, Ecuador | Missing | Access | |
| Bulimulus saeronius | (Dall, 1917) | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Bulimulus sp. nov. ‘josevillani’ | - | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Bulimulus sp. nov. ‘krameri’ | - | Kramer’s bulimulus | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access |
| Bulimulus sp. nov. ‘nilsodhneri’ | - | Sodhner’s bulimulus | ? | Galápagos Islands, Ecuador | Missing | Access |
| Bulimulus sp. nov. 'tuideroyi' | - | Tui De Roy’s bulimulus | ? | Galápagos Islands, Ecuador | Missing | Access |
| Bulimulus sp. nov. ‘vanmoli’ | - | Van Mol’s bulimulus | ? | Galápagos Islands, Ecuador | Missing | Access |
| Naesiotus achatellinus | (Forbes, 1850) | 1983 or before |
San Cristobal, Galápagos Islands, Ecuador
|
Missing | Access | |
| Naesiotus adelphus | (Dall, 1917) | 2000 or before |
Santa Cruz, Galápagos Islands
|
Missing | Access | |
| Naesiotus adserseni MS | - | ? |
Santa Cruz, Galápagos Islands, Ecuador
|
Missing | Access | |
| Naesiotus albermalensis | (Dall, 1917) | ? | Isabella, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus arnaldoi | (Lanzieri and Rezende, 1971) | ? |
Trindade Island, Brazil
|
Missing | Access | |
| Naesiotus blombergi | (Odhner, 1951) | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus cavagnaroi | A. G. Smith, 1972 | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus deridderi MS | - | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus eos | (Odhner, 1951) | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus lycodus | (Dall, 1917) | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access | |
| Naesiotus rabidensis | (Dall, 1917) | Rabida land snail | - | Rabida Island, Galápagos Islands, Ecuador | Rediscovered | Access |
| Naesiotus tanneri | (Dall, 1895) | ? | Santa Cruz, Galápagos Islands, Ecuador | Missing | Access |
Family: Odontostomidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Biotocus turbinatus | (Pfeiffer, 1845) | ? | Brazil | Extinct | Access | |
|
Hyperaulax ramagei |
(E. A. Smith, 1890) | early 20th century | Fernando de Noronha Archipelago, Brazil | Missing | Access | |
| Tomigerus gibberulus | Burrow, 1815 | ? | Brazil | Extinct | Access |
Family: Orthalicidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Leucocharis loyaltyensis | (Souverbie, 1879) | - | ? | Maré, Loyalty Islands, New Caledonia | Extinct | Access |
| Leucocharis porphyrochila | (Dautzenberg & Bernier, 1901) | - | ? | New Caledonia | Extinct | Access |
| Liguus crenatus farnumi | Clench 1929 | - | ? | Florida, USA | Invalid (synonym) | Access |
| Liguus fasciatus f. beardi | A. L. Jones, 1979 | Florida tree-snail | ? | Florida, USA | Invalid (synonym) | Access |
| Liguus fasciatus solidus | Say, 1825 | - | ? | Lower Florida Keys, Florida, USA | Extinct? | Access |
| Liguus fasciatus solidus var. violafumosus | Doe, 1937 | - | September 1935 or later | Pinecrest, Nevada County, California, USA | Invalid (synonym) | Access |
| Liguus solidus dohertyi | Pfleuger, 1934 | - | ? | Lower Matecumbe Key, Florida, USA | Invalid (synonym) | Access |
Family: Simpulopsidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Leiostracus carnavalescus | Simone & Salvador, 2016 | (rediscovered) | Nanuque, Minas Gerais, Brazil | Rediscovered | Access |