Find out what mammals, insects, fish, plants, etc. are endangered here. Use the selection box below to view full lists by group.
The following is a list of all endangered snails.
| | Species Name | Scientific Name | Range |
|---|
| 1. | Acicula norrisi | Acicula norrisi | Gibraltar |
| 2. | Acicula palaestinensis | Acicula palaestinensis | Israel |
| 3. | Actinella anaglyptica | Actinella anaglyptica | Portugal (Madeira) |
| 4. | Actinella armitageana | Actinella armitageana | Portugal (Madeira) |
| 5. | Actinella carinofausta | Actinella carinofausta | Portugal (Madeira) |
| 6. | Actinella effugiens | Actinella effugiens | Portugal (Madeira) |
| 7. | Actinella giramica | Actinella giramica | Portugal (Madeira) |
| 8. | Adelopoma stolli | Adelopoma stolli | Guatemala, Nicaragua |
| 9. | Advena charon | Advena charon | Australia (Norfolk Island) |
| 10. | Afrogyrus rodriguezensis | Afrogyrus rodriguezensis | Mauritius (Rodrigues Islands) |
| 11. | Afrogyrus starmuehlneri | Afrogyrus starmuehlneri | Madagascar |
| 12. | Alamosa Springsnail | Tryonia alamosae | New Mexico |
| 13. | Allocharopa erskinensis | Allocharopa erskinensis | Australia |
| 14. | Alzoniella hartwigschuetti | Alzoniella hartwigschuetti | Austria |
| 15. | Amastrid Land Snail | Amastra cylindrica | Hawaii |
| 16. | Amastrid Land Snail | Amastra micans | Hawaii |
| 17. | Amastrid Land Snail | Amastra rubens | Hawaii |
| 18. | Amastrid Land Snail | Amastra spirizona | Hawaii |
| 19. | Amastrid Land Snail (Amastridae) | Armsia petasus | Hawaii |
| 20. | Ampelita soulaiana | Ampelita soulaiana | Madagascar |
| 21. | Ampelita fulgurata | Ampelita fulgurata | Madagascar |
| 22. | Ampelita julii | Ampelita julii | Madagascar |
| 23. | Amphicyclotulus liratus | Amphicyclotulus liratus | West Indies |
| 24. | Amphicyclotulus perplexus | Amphicyclotulus perplexus | West Indies |
| 25. | Amphorella iridescens | Amphorella iridescens | Portugal |
| 26. | Amphorella melampoides | Amphorella melampoides | Portugal |
| 27. | Amphorella producta | Amphorella producta | Portugal |
| 28. | Amplirhagada astuta | Amplirhagada astuta | Australia |
| 29. | Amplirhagada questroana | Amplirhagada questroana | Australia |
| 30. | Anceya terebriformis | Anceya terebriformis | Democratic Republic of Congo (Zaire), Tanzania |
| 31. | Ancylus ashangiensis | Ancylus ashangiensis | Ethiopia |
| 32. | Angrobia grampianensis | Angrobia grampianensis | Australia |
| 33. | Angrobia anodonta | Angrobia anodonta | Australia |
| 34. | Angrobia dyeriana | Angrobia dyeriana | Australia |
| 35. | Angrobia petterdi | Angrobia petterdi | Australia |
| 36. | Angular Pebblesnail | Somatogyrus biangulatus | Alabama |
| 37. | Anthony's Riversnail | Athearnia anthonyi | Georgia, Tennessee |
| 38. | Antrobia culveri | Antrobia culveri | Montana |
| 39. | Antrobia breweri | Antrobia breweri | Alabama |
| 40. | Arinia dentifera | Arinia dentifera | Malaysia (Sabah) |
| 41. | Arinia boreoborneensis | Arinia boreoborneensis | Malaysia (Sabah) |
| 42. | Arinia oviformis | Arinia oviformis | Malaysia (Sabah) |
| 43. | Arinia biplicata | Arinia biplicata | Malaysia (Sabah) |
| 44. | Arinia streptaxiformis | Arinia streptaxiformis | Malaysia (Sabah) |
| 45. | Arinia simplex | Arinia simplex | Malaysia (Sabah) |
| 46. | Armigerous River Snail | Lithasia armigera | United States |
| 47. | Armored Snail | Pyrgulopsis marstonia pachyta | Alabama |
| 48. | Atlas Pebblesnail | Somatogyrus humerosus | Alabama |
| 49. | Australian Freshwater Limpet | Ancylastrum cumingianus | Australia |
| 50. | Aylacostoma chloroticum | Aylacostoma chloroticum | Argentina, Paraguay |
| 51. | Aylacostoma guaraniticum | Aylacostoma guaraniticum | Argentina, Paraguay |
| 52. | Aylacostoma stigmaticum | Aylacostoma stigmaticum | Argentina, Paraguay |
| 53. | Banbury Springs Limpet | Lanx spp. | Idaho |
| 54. | Bathanalia howesi | Bathanalia howesi | Democratic Republic of Congo (Zaire), Tanzania |
| 55. | Belgrandiella austriana | Belgrandiella austriana | Austria |
| 56. | Belgrandiella ganslmayri | Belgrandiella ganslmayri | Austria |
| 57. | Belgrandiella mimula | Belgrandiella mimula | Austria |
| 58. | Belgrandiella pelerei | Belgrandiella pelerei | Austria |
| 59. | Belgrandiella parreyssi | Belgrandiella parreyssi | Austria |
| 60. | Belgrandiella styriaca | Belgrandiella styriaca | Austria |
| 61. | Belgrandiella wawrai | Belgrandiella wawrai | Austria |
| 62. | Belgrandiella alticola | Belgrandiella alticola | Slovakia |
| 63. | Belgrandiella bojnicensis | Belgrandiella bojnicensis | Slovakia |
| 64. | Belgrandiella fuchsi | Belgrandiella fuchsi | Austria |
| 65. | Belgrandiella pyrenaica | Belgrandiella pyrenaica | France |
| 66. | Belgrandiella slovenica | Belgrandiella slovenica | Slovakia |
| 67. | Bellamya liberiana | Bellamya liberiana | Liberia |
| 68. | Bellamya constricta | Bellamya constricta | Kenya, Tanzania, Uganda |
| 69. | Bellamya contracta | Bellamya contracta | Democratic Republic of Congo (Zaire) |
| 70. | Bellamya crawshayi | Bellamya crawshayi | Democratic Republic of Congo (Zaire), Zambia |
| 71. | Bellamya leopoldvillensis | Bellamya leopoldvillensis | Democratic Republic of Congo (Zaire) |
| 72. | Bellamya mweruensis | Bellamya mweruensis | Democratic Republic of Congo (Zaire), Zambia |
| 73. | Bellamya pagodiformis | Bellamya pagodiformis | Democratic Republic of Congo (Zaire), Zambia |
| 74. | Bellamya phthinotropis | Bellamya phthinotropis | Kenya, Tanzania, Uganda |
| 75. | Bellamya robertsoni | Bellamya robertsoni | Malawi, Mozambique |
| 76. | Bellamya rubicunda | Bellamya rubicunda | Democratic Republic of Congo (Zaire), Uganda |
| 77. | Bellamya trochearis | Bellamya trochearis | Kenya, Tanzania, Uganda |
| 78. | Bellamya costulata | Bellamya costulata | Kenya, Tanzania, Uganda |
| 79. | Bellamya jucunda | Bellamya jucunda | Kenya, Tanzania, Uganda |
| 80. | Bellamya monardi | Bellamya monardi | Angola, Namibia |
| 81. | Biomphalaria barthi | Biomphalaria barthi | Ethiopia |
| 82. | Black Abalone | Haliotis cracherodii | California, Mexico (Baja California) |
| 83. | Black Mudalia | Leptoxis melanoidus | Alabama |
| 84. | Blue Spring Aphaostracon | Aphaostracon asthenes | Florida |
| 85. | Boninena callistoderma | Boninena callistoderma | Japan |
| 86. | Boninena hiraseana | Boninena hiraseana | Japan |
| 87. | Boninena ogasawarae | Boninena ogasawarae | Japan |
| 88. | Bothriembryon perobesus | Bothriembryon perobesus | Australia |
| 89. | Bothriembryon praecelcus | Bothriembryon praecelcus | Australia |
| 90. | Bothriembryon bradshaweri | Bothriembryon bradshaweri | Australia |
| 91. | Bothriembryon brazieri | Bothriembryon brazieri | Australia |
| 92. | Bothriembryon glauerti | Bothriembryon glauerti | Australia |
| 93. | Bothriembryon irvineanus | Bothriembryon irvineanus | Australia |
| 94. | Bothriembryon spenceri | Bothriembryon spenceri | Australia |
| 95. | Bothriembryon whitleyi | Bothriembryon whitleyi | Australia |
| 96. | Boucardicus fidimananai | Boucardicus fidimananai | Madagascar |
| 97. | Boucardicus fortistriatus | Boucardicus fortistriatus | Madagascar |
| 98. | Boucardicus simplex | Boucardicus simplex | Madagascar |
| 99. | Boucardicus carylae | Boucardicus carylae | Madagascar |
| 100. | Boucardicus culminans | Boucardicus culminans | Madagascar |
| 101. | Boucardicus curvifolius | Boucardicus curvifolius | Madagascar |
| 102. | Boucardicus delicatus | Boucardicus delicatus | Madagascar |
| 103. | Boucardicus divei | Boucardicus divei | Madagascar |
| 104. | Boucardicus esetrae | Boucardicus esetrae | Madagascar |
| 105. | Boucardicus magnilobatus | Boucardicus magnilobatus | Madagascar |
| 106. | Boucardicus mahermanae | Boucardicus mahermanae | Madagascar |
| 107. | Boucardicus randalanai | Boucardicus randalanai | Madagascar |
| 108. | Boucardicus victorhernandezi | Boucardicus victorhernandezi | Madagascar |
| 109. | Boucardicus albocinctus | Boucardicus albocinctus | Madagascar |
| 110. | Boucardicus antiquus | Boucardicus antiquus | Madagascar |
| 111. | Boucardicus rakotoarisoni | Boucardicus rakotoarisoni | Madagascar |
| 112. | Boucardicus tridentatus | Boucardicus tridentatus | Madagascar |
| 113. | Bridouxia ponsonbyi | Bridouxia ponsonbyi | Burundi, Tanzania, Zambia |
| 114. | Bridouxia praeclara | Bridouxia praeclara | Burundi, Tanzania, Zambia |
| 115. | Bruneau Hot Springsnail | Pyrgulopsis bruneauensis | Idaho |
| 116. | Bulinus succinoides | Bulinus succinoides | Malawi |
| 117. | Bulinus camerunensis | Bulinus camerunensis | Cameroon |
| 118. | Bulinus hightoni | Bulinus hightoni | Kenya |
| 119. | Bulinus mutandensis | Bulinus mutandensis | Uganda |
| 120. | Bulinus nyassanus | Bulinus nyassanus | Malawi |
| 121. | Bulinus transversalis | Bulinus transversalis | Kenya, Uganda |
| 122. | Burnup's Hunter Slug | Chlamydephorus burnupi | South Africa |
| 123. | Burnupia crassistriata | Burnupia crassistriata | Kenya |
| 124. | Burnupia stuhlmanni | Burnupia stuhlmanni | Kenya, Tanzania, Uganda |
| 125. | Bythinella bicarinata | Bythinella bicarinata | France |
| 126. | Bythinella badensis | Bythinella badensis | Germany |
| 127. | Bythinella bavarica | Bythinella bavarica | Germany |
| 128. | Bythinella compressa | Bythinella compressa | Germany |
| 129. | Bythinella cylindrica | Bythinella cylindrica | Austria |
| 130. | Bythinella dunkeri | Bythinella dunkeri | Belgium, Germany |
| 131. | Bythinella padiraci | Bythinella padiraci | France |
| 132. | Bythinella viridis | Bythinella viridis | Belgium, France |
| 133. | Bythiospeum cisterciensorum | Bythiospeum cisterciensorum | Austria |
| 134. | Bythiospeum geyeri | Bythiospeum geyeri | Austria |
| 135. | Bythiospeum noricum | Bythiospeum noricum | Austria |
| 136. | Bythiospeum pfeifferi | Bythiospeum pfeifferi | Austria |
| 137. | Bythiospeum reisalpense | Bythiospeum reisalpense | Austria |
| 138. | Bythiospeum tschapecki | Bythiospeum tschapecki | Austria |
| 139. | Bythiospeum acicula | Bythiospeum acicula | Germany |
| 140. | Bythiospeum articense | Bythiospeum articense | France |
| 141. | Bythiospeum bourguignati | Bythiospeum bourguignati | France |
| 142. | Bythiospeum garnieri | Bythiospeum garnieri | France |
| 143. | Bythiospeum quenstedti | Bythiospeum quenstedti | Germany |
| 144. | Bythiospeum sandbergeri | Bythiospeum sandbergeri | Germany |
| 145. | Caseolus subcalliferus | Caseolus subcalliferus | Portugal (Madeira) |
| 146. | Caseolus calculus | Caseolus calculus | Portugal (Madeira) |
| 147. | Caseolus commixtus | Caseolus commixtus | Portugal (Madeira) |
| 148. | Catalina Mountain Snail | Radiocentrum avalonense | California |
| 149. | Cecilioides eulima | Cecilioides eulima | Portugal (Madeira) |
| 150. | Cecilioides connollyi | Cecilioides connollyi | Gibraltar |
| 151. | Ceratophallus socotrensis | Ceratophallus socotrensis | Yemen |
| 152. | Cerion nanus | Cerion nanus | Caymans |
| 153. | Clench's Middle-toothed Land Snail | Mesodon clenchi | Arkansas |
| 154. | Cleopatra cridlandi | Cleopatra cridlandi | Kenya, Tanzania, Uganda |
| 155. | Cleopatra exarata | Cleopatra exarata | Kenya |
| 156. | Coahuilix De Hubbs Snail | Coahuilix hubbsi | Mexico |
| 157. | Cone Shell | Conus africanus | Angola |
| 158. | Cone Shell | Conus cepasi | Angola |
| 159. | Cone Shell | Conus nobrei | Angola |
| 160. | Cone Shell | Conus zebroides | Angola |
| 161. | Cookeconcha contorta | Cookeconcha contorta | Hawaii |
| 162. | Coosa Pebblesnail | Somatogyrus coosaensis | Alabama |
| 163. | Cristilabrum bubulum | Cristilabrum bubulum | Australia |
| 164. | Cristilabrum buryillum | Cristilabrum buryillum | Australia |
| 165. | Cristilabrum grossum | Cristilabrum grossum | Australia |
| 166. | Cristilabrum solitudum | Cristilabrum solitudum | Australia |
| 167. | Cristilabrum isolatum | Cristilabrum isolatum | Australia |
| 168. | Cristilabrum monodon | Cristilabrum monodon | Australia |
| 169. | Cristilabrum primum | Cristilabrum primum | Australia |
| 170. | Cristilabrum rectum | Cristilabrum rectum | Australia |
| 171. | Cristilabrum simplex | Cristilabrum simplex | Australia |
| 172. | Cryptazeca kobelti | Cryptazeca kobelti | Spain |
| 173. | Cryptazeca elongata | Cryptazeca elongata | Spain |
| 174. | Cryptazeca monodonta | Cryptazeca monodonta | France, Spain |
| 175. | Cryptazeca spelaea | Cryptazeca spelaea | Spain |
| 176. | Cryptazeca subcylindrica | Cryptazeca subcylindrica | France |
| 177. | Ctenophila caldwelli | Ctenophila caldwelli | Mauritius |
| 178. | Ctenophila setiliris | Ctenophila setiliris | Indian Ocean (Reunion) |
| 179. | Ctenophila vorticella | Ctenophila vorticella | Indian Ocean (Reunion) |
| 180. | Cupedora evandaleana | Cupedora evandaleana | Australia |
| 181. | Cylindrical Lioplax Snail | Lioplax cyclostomaformis | Alabama, Georgia |
| 182. | Damochlora millepunctata | Damochlora millepunctata | Australia |
| 183. | Damochlora spina | Damochlora spina | Australia |
| 184. | Dancea rodriguezensis | Dancea rodriguezensis | Mauritius (Rodrigues Islands) |
| 185. | Dense Hydrobe | Aphaostracon pycnum | Florida |
| 186. | Diplommatina cacuminulus | Diplommatina cacuminulus | Malaysia (Sabah) |
| 187. | Diplommatina madaiensis | Diplommatina madaiensis | Malaysia (Sabah) |
| 188. | Discula bulweri | Discula bulweri | Portugal |
| 189. | Discula tabellata | Discula tabellata | Portugal |
| 190. | Discula testudinalis | Discula testudinalis | Portugal |
| 191. | Discula lyelliana | Discula lyelliana | Portugal |
| 192. | Discula tetrica | Discula tetrica | Portugal |
| 193. | Discula bicarinata | Discula bicarinata | Portugal |
| 194. | Discula cheiranthicola | Discula cheiranthicola | Portugal |
| 195. | Discula echinulata | Discula echinulata | Portugal |
| 196. | Discula leacockiana | Discula leacockiana | Portugal |
| 197. | Discula oxytropis | Discula oxytropis | Portugal |
| 198. | Discula tectiformis | Discula tectiformis | Portugal |
| 199. | Discula turricula | Discula turricula | Portugal |
| 200. | Discus guerinianus | Discus guerinianus | Portugal (Madeira) |
| 201. | Dolapex amiculus | Dolapex amiculus | Indian Ocean (Norfolk Islands) |
| 202. | Draparnaudia anniae | Draparnaudia anniae | New Caledonia |
| 203. | Draparnaudia subnecata | Draparnaudia subnecata | New Caledonia |
| 204. | Drymaeus acervatus | Drymaeus acervatus | Brazil |
| 205. | Drymaeus henseli | Drymaeus henseli | Brazil |
| 206. | Duckwater Pyrg | Pyrgulopsis aloba | Nevada |
| 207. | Dupontia perlucida | Dupontia perlucida | Mauritius |
| 208. | Dupontia levis | Dupontia levis | Mauritius |
| 209. | Dupontia nitella | Dupontia nitella | Mauritius |
| 210. | Dupontia poweri | Dupontia poweri | Mauritius |
| 211. | Dutton's River Snail | Lithasia duttoniana | Tennessee |
| 212. | Dwarf Pebblesnail | Somatogyrus nanus | Alabama |
| 213. | Elasmias cernicum | Elasmias cernicum | Mauritius |
| 214. | Elasmias kitaiwojimanum | Elasmias kitaiwojimanum | Japan |
| 215. | Elk River File Snail | Lithasia lima | Alabama, Tennessee |
| 216. | Endodonta apiculata | Endodonta apiculata | Hawaii |
| 217. | Erepta odontina | Erepta odontina | Mauritius |
| 218. | Erepta stylodon | Erepta stylodon | Mauritius |
| 219. | Eua zebrina | Eua zebrina | American Samoa |
| 220. | Euchondrus ramonensis | Euchondrus ramonensis | Israel |
| 221. | Euonyma curtissima | Euonyma curtissima | Kenya |
| 222. | Falkneri camerani | Falkneri camerani | Italy |
| 223. | Fenney Spring Hydrobe | Aphaostracon xynoelictum | Florida |
| 224. | Fenouilia kreitneri | Fenouilia kreitneri | China (Yunnan) |
| 225. | Flat Pebblesnail | Lepyrium showalteri | Alabama |
| 226. | Fluted Pebblesnail | Somatogyrus hendersoni | Alabama |
| 227. | Fonscochlea billakalina | Fonscochlea billakalina | Australia |
| 228. | Fonscochlea accepta | Fonscochlea accepta | Australia |
| 229. | Fonscochlea aquatica | Fonscochlea aquatica | Australia |
| 230. | Fonscochlea conica | Fonscochlea conica | Australia |
| 231. | Foushee Cavesnail | Amnicola cora | Arkansas |
| 232. | Fraternal Snail | Micrarionta feralis | California |
| 233. | Gabbiella rosea | Gabbiella rosea | Kenya |
| 234. | Galapagos Land Snail | Bulimulus achatellinus | Ecuador (Galapagos Islands) |
| 235. | Galapagos Land Snail | Bulimulus adelphus | Ecuador (Galapagos Islands) |
| 236. | Galapagos Land Snail | Bulimulus adserseni | Ecuador (Galapagos Islands) |
| 237. | Galapagos Land Snail | Bulimulus chemitzioides | Ecuador (Galapagos Islands) |
| 238. | Galapagos Land Snail | Bulimulus curtus | Ecuador (Galapagos Islands) |
| 239. | Galapagos Land Snail | Bulimulus deridderi | Ecuador (Galapagos Islands) |
| 240. | Galapagos Land Snail | Bulimulus duncanus | Ecuador (Galapagos Islands) |
| 241. | Galapagos Land Snail | Bulimulus eos | Ecuador (Galapagos Islands) |
| 242. | Galapagos Land Snail | Bulimulus eschariferus | Ecuador (Galapagos Islands) |
| 243. | Galapagos Land Snail | Bulimulus galapaganus | Ecuador (Galapagos Islands) |
| 244. | Galapagos Land Snail | Bulimulus habeli | Ecuador (Galapagos Islands) |
| 245. | Galapagos Land Snail | Bulimulus hirsutus | Ecuador (Galapagos Islands) |
| 246. | Galapagos Land Snail | Bulimulus indefatigabilis | Ecuador (Galapagos Islands) |
| 247. | Galapagos Land Snail | Bulimulus jacobi | Ecuador (Galapagos Islands) |
| 248. | Galapagos Land Snail | Bulimulus lycodus | Ecuador (Galapagos Islands) |
| 249. | Galapagos Land Snail | Bulimulus ochsneri | Ecuador (Galapagos Islands) |
| 250. | Galapagos Land Snail | Bulimulus reibischi | Ecuador (Galapagos Islands) |
| 251. | Galapagos Land Snail | Bulimulus saeronius | Ecuador (Galapagos Islands) |
| 252. | Galapagos Land Snail | Bulimulus sculpturatus | Ecuador (Galapagos Islands) |
| 253. | Galapagos Land Snail | Bulimulus sp. nov. 'josevillani' | Ecuador (Galapagos Islands) |
| 254. | Galapagos Land Snail | Bulimulus sp. nov. 'krameri' | Ecuador (Galapagos Islands) |
| 255. | Galapagos Land Snail | Bulimulus sp. nov. 'nilsodhneri' | Ecuador (Galapagos Islands) |
| 256. | Galapagos Land Snail | Bulimulus sp. nov. 'tuideroyi' | Ecuador (Galapagos Islands) |
| 257. | Galapagos Land Snail | Bulimulus sp. nov. 'vanmoli' | Ecuador (Galapagos Islands) |
| 258. | Galapagos Land Snail | Bulimulus tanneri | Ecuador (Galapagos Islands) |
| 259. | Galapagos Land Snail | Bulimulus wolfi | Ecuador (Galapagos Islands) |
| 260. | Galapagos Land Snail | Bulimulus cinerarius | Ecuador (Galapagos Islands) |
| 261. | Galapagos Land Snail | Bulimulus cucullinus | Ecuador (Galapagos Islands) |
| 262. | Galapagos Land Snail | Bulimulus nux | Ecuador (Galapagos Islands) |
| 263. | Galapagos Land Snail | Bulimulus olla | Ecuador (Galapagos Islands) |
| 264. | Galapagos Land Snail | Bulimulus perspectivus | Ecuador (Galapagos Islands) |
| 265. | Galapagos Land Snail | Bulimulus planospira | Ecuador (Galapagos Islands) |
| 266. | Galapagos Land Snail | Bulimulus rugulosus | Ecuador (Galapagos Islands) |
| 267. | Galapagos Land Snail | Bulimulus akamatus | Ecuador (Galapagos Islands) |
| 268. | Galapagos Land Snail | Bulimulus alethorhytidus | Ecuador (Galapagos Islands) |
| 269. | Galapagos Land Snail | Bulimulus amastroides | Ecuador (Galapagos Islands) |
| 270. | Galapagos Land Snail | Bulimulus blombergi | Ecuador (Galapagos Islands) |
| 271. | Galapagos Land Snail | Bulimulus calvus | Ecuador (Galapagos Islands) |
| 272. | Galapagos Land Snail | Bulimulus cavagnaroi | Ecuador (Galapagos Islands) |
| 273. | Galapagos Land Snail | Bulimulus darwini | Ecuador (Galapagos Islands) |
| 274. | Galapagos Land Snail | Bulimulus hoodensis | Ecuador (Galapagos Islands) |
| 275. | Galapagos Land Snail | Bulimulus jervisensis | Ecuador (Galapagos Islands) |
| 276. | Galapagos Land Snail | Bulimulus nesioticus | Ecuador (Galapagos Islands) |
| 277. | Galapagos Land Snail | Bulimulus perrus | Ecuador (Galapagos Islands) |
| 278. | Galapagos Land Snail | Bulimulus rabidensis | Ecuador (Galapagos Islands) |
| 279. | Galapagos Land Snail | Bulimulus tortuganus | Ecuador (Galapagos Islands) |
| 280. | Galapagos Land Snail | Bulimulus unifasciatus | Ecuador (Galapagos Islands) |
| 281. | Galapagos Land Snail | Bulimulus ustulatus | Ecuador (Galapagos Islands) |
| 282. | Geomitra coronata | Geomitra coronata | Portugal (Madeira) |
| 283. | Geomitra delphinuloides | Geomitra delphinuloides | Portugal (Madeira) |
| 284. | Geomitra moniziana | Geomitra moniziana | Portugal (Madeira) |
| 285. | Geomitra tiarella | Geomitra tiarella | Portugal (Madeira) |
| 286. | Glyptophysa petiti | Glyptophysa petiti | New Caledonia |
| 287. | Glyptorhagada silveri | Glyptorhagada silveri | Australia |
| 288. | Glyptorhagada bordaensis | Glyptorhagada bordaensis | Australia |
| 289. | Glyptorhagada euglypta | Glyptorhagada euglypta | Australia |
| 290. | Glyptorhagada kooringensis | Glyptorhagada kooringensis | Australia |
| 291. | Glyptorhagada tattawuppana | Glyptorhagada tattawuppana | Australia |
| 292. | Gonidomus sulcatus | Gonidomus sulcatus | Mauritius |
| 293. | Gonospira deshayesi | Gonospira deshayesi | Indian Ocean |
| 294. | Gonospira duponti | Gonospira duponti | Indian Ocean |
| 295. | Gonospira uvula | Gonospira uvula | Indian Ocean |
| 296. | Gonospira cylindrella | Gonospira cylindrella | Indian Ocean |
| 297. | Gonospira holostoma | Gonospira holostoma | Indian Ocean |
| 298. | Gonospira madgei | Gonospira madgei | Indian Ocean |
| 299. | Gonospira striaticostus | Gonospira striaticostus | Indian Ocean |
| 300. | Gonospira teres | Gonospira teres | Indian Ocean |
| 301. | Gonospira turgidula | Gonospira turgidula | Indian Ocean |
| 302. | Gonyostomus gonyostomus | Gonyostomus gonyostomus | Brazil |
| 303. | Gonyostomus insularis | Gonyostomus insularis | Brazil |
| 304. | Granulated Snail | Anoglypta launcestonensis | Australia (Tasmania) |
| 305. | Graziana klagenfurtensis | Graziana klagenfurtensis | Austria |
| 306. | Gulella Snail | Gulella antelmeana | Mauritius |
| 307. | Gulella Snail | Gulella aprosdoketa | South Africa |
| 308. | Gulella Snail | Gulella claustralis | South Africa |
| 309. | Gulella Snail | Gulella puzeyi | South Africa |
| 310. | Gulella Snail | Gulella salpinx | South Africa |
| 311. | Gulella Snail | Gulella taitensis | Kenya |
| 312. | Gulella Snail | Gulella thomasseti | Indian Ocean (Seychelles) |
| 313. | Gulella Snail | Gulella amboniensis | Tanzania |
| 314. | Gulickia alexandri | Gulickia alexandri | Hawaii |
| 315. | Gyraulus cockburni | Gyraulus cockburni | Yemen |
| 316. | Gyraulus mauritianus | Gyraulus mauritianus | Mauritius |
| 317. | Hacrochlamys lineolatus | Hacrochlamys lineolatus | Japan |
| 318. | Harmogenanina implicata | Harmogenanina implicata | Indian Ocean |
| 319. | Harmogenanina argentea | Harmogenanina argentea | Indian Ocean |
| 320. | Hauffenia kerschneri | Hauffenia kerschneri | Austria |
| 321. | Hauffenia wienerwaldensis | Hauffenia wienerwaldensis | Austria |
| 322. | Hauffenia sp. nov. | Hauffenia sp. nov. | Slovakia |
| 323. | Helicarion leopardina | Helicarion leopardina | Australia |
| 324. | Helicarion leopardina | Helicarion leopardina | Australia |
| 325. | Helicarion porrectus | Helicarion porrectus | Australia |
| 326. | Helicarion rubicundus | Helicarion rubicundus | Australia |
| 327. | Helicella bierzona | Helicella bierzona | Spain |
| 328. | Helicella bierzona | Helicella bierzona | Spain |
| 329. | Helicella mariae | Helicella mariae | Spain |
| 330. | Helicella stiparum | Helicella stiparum | Spain |
| 331. | Helicina rostrata | Helicina rostrata | Guatemala, Nicaragua |
| 332. | Helicostyla smargadina | Helicostyla smargadina | Philippines |
| 333. | Helix ceratina | Helix ceratina | France |
| 334. | Helix texta | Helix texta | Israel |
| 335. | Helix obruta | Helix obruta | Portugal |
| 336. | Hemicycla saulcyi | Hemicycla saulcyi | Spain |
| 337. | Hemicycla pouchet | Hemicycla pouchet | Spain |
| 338. | Hemistoma beaumonti | Hemistoma beaumonti | Australia |
| 339. | Hemistoma pusillior | Hemistoma pusillior | Australia |
| 340. | Hemistoma whiteleggei | Hemistoma whiteleggei | Australia |
| 341. | Hemistoma flexicolumella | Hemistoma flexicolumella | Australia |
| 342. | Hemistoma minutissima | Hemistoma minutissima | Australia |
| 343. | Heterocyclus perroquini | Heterocyclus perroquini | New Caledonia |
| 344. | Heterocyclus petiti | Heterocyclus petiti | New Caledonia |
| 345. | Hidden Pebblesnail | Somatogyrus decipiens | Alabama |
| 346. | Hirasea acutissima | Hirasea acutissima | Japan |
| 347. | Hirasea chichijimana | Hirasea chichijimana | Japan |
| 348. | Hirasea diplomphalus | Hirasea diplomphalus | Japan |
| 349. | Hirasea insignis | Hirasea insignis | Japan |
| 350. | Hirasea operculina | Hirasea operculina | Japan |
| 351. | Hirinaba curytibana | Hirinaba curytibana | Brazil |
| 352. | Hirthia littorina | Hirthia littorina | Democratic Republic of Congo (Zaire), Tanzania |
| 353. | Idaho Springsnail | Pyrgulopsis idahoensis | Idaho |
| 354. | Iglica kleinzellensis | Iglica kleinzellensis | Austria |
| 355. | Insulivitrina reticulata | Insulivitrina reticulata | Spain |
| 356. | Iowa Pleistocene Snail | Discus macclintocki | Illinois, Iowa |
| 357. | Jardinella acuminata | Jardinella acuminata | Australia |
| 358. | Jardinella colmani | Jardinella colmani | Australia |
| 359. | Jardinella jesswiseae | Jardinella jesswiseae | Australia |
| 360. | Jardinella pallida | Jardinella pallida | Australia |
| 361. | Jardinella carnarvonensis | Jardinella carnarvonensis | Australia |
| 362. | Jardinella coreena | Jardinella coreena | Australia |
| 363. | Jardinella corrugata | Jardinella corrugata | Australia |
| 364. | Jardinella edgbastonensis | Jardinella edgbastonensis | Australia |
| 365. | Jardinella eulo | Jardinella eulo | Australia |
| 366. | Jardinella exigua | Jardinella exigua | Australia |
| 367. | Jardinella isolata | Jardinella isolata | Australia |
| 368. | Jardinella zeidlerorum | Jardinella zeidlerorum | Australia |
| 369. | Jay's River Snail | Lithasia jayana | Tennessee |
| 370. | Kanab Amber Snail | Oxyloma kanabense | Arizona, Canada, Utah |
| 371. | Kanab Ambersnail | Oxyloma haydeni kanabensis | Arizona, Utah |
| 372. | Kern Shoulderband | Helminthoglypta callistoderma | California |
| 373. | Kimboraga exanimus | Kimboraga exanimus | Australia |
| 374. | Kimboraga koolanensis | Kimboraga koolanensis | Australia |
| 375. | Kimboraga micromphala | Kimboraga micromphala | Australia |
| 376. | Kimboraga yammerana | Kimboraga yammerana | Australia |
| 377. | Kondoconcha othnius | Kondoconcha othnius | French Polynesia |
| 378. | Koster's Springsnail | Juturnia kosteri | New Mexico |
| 379. | Laevicaulis haroldi | Laevicaulis haroldi | South Africa (KwaZulu-Natal) |
| 380. | Lamellidea biplicata | Lamellidea biplicata | Japan |
| 381. | Lamellidea ogasawarana | Lamellidea ogasawarana | Japan |
| 382. | Laminella sanguinea | Laminella sanguinea | Hawaii |
| 383. | Lampedusa melitensis | Lampedusa melitensis | Malta |
| 384. | Lampedusa imitratix | Lampedusa imitratix | Malta |
| 385. | Lamprocystis hahajimana | Lamprocystis hahajimana | Japan |
| 386. | Lanistes alexandri | Lanistes alexandri | Tanzania |
| 387. | Lanistes farleri | Lanistes farleri | Tanzania |
| 388. | Lanistes nasutus | Lanistes nasutus | Malawi, Mozambique |
| 389. | Lanistes neritoides | Lanistes neritoides | Republic of Congo |
| 390. | Lanistes nyssanus | Lanistes nyssanus | Malawi, Mozambique |
| 391. | Lanistes solidus | Lanistes solidus | Malawi, Mozambique |
| 392. | Lanistes stuhlmanni | Lanistes stuhlmanni | Malawi, Mozambique |
| 393. | Lanistes bicarinatus | Lanistes bicarinatus | Democratic Republic of Congo (Zaire) |
| 394. | Lanistes intortus | Lanistes intortus | Democratic Republic of Congo (Zaire) |
| 395. | Lantzia carinata | Lantzia carinata | Indian Ocean (Reunion) |
| 396. | Lavigera coronata | Lavigera coronata | Democratic Republic of Congo (Zaire), Tanzania |
| 397. | Leiostyla abbreviata | Leiostyla abbreviata | Portugal |
| 398. | Leiostyla cassidula | Leiostyla cassidula | Portugal |
| 399. | Leiostyla gibba | Leiostyla gibba | Portugal |
| 400. | Leiostyla heterodon | Leiostyla heterodon | Portugal |
| 401. | Leiostyla simulator | Leiostyla simulator | Portugal |
| 402. | Leiostyla callathiscus | Leiostyla callathiscus | Portugal |
| 403. | Leiostyla cheiligona | Leiostyla cheiligona | Portugal |
| 404. | Leiostyla concinna | Leiostyla concinna | Portugal |
| 405. | Leiostyla corneocostata | Leiostyla corneocostata | Portugal |
| 406. | Leiostyla degenerata | Leiostyla degenerata | Portugal |
| 407. | Leiostyla ferraria | Leiostyla ferraria | Portugal |
| 408. | Leiostyla filicum | Leiostyla filicum | Portugal |
| 409. | Leiostyla laevigata | Leiostyla laevigata | Portugal |
| 410. | Leiostyla monticola | Leiostyla monticola | Portugal |
| 411. | Leiostyla relevata | Leiostyla relevata | Portugal |
| 412. | Leiostyla vermiculosa | Leiostyla vermiculosa | Portugal |
| 413. | Lemniscia calva | Lemniscia calva | Portugal |
| 414. | Lemniscia michaudi | Lemniscia michaudi | Portugal |
| 415. | Leptachatina lepida | Leptachatina lepida | Hawaii |
| 416. | Leptaxis caldeirarum | Leptaxis caldeirarum | Portugal |
| 417. | Leptaxis vetusa | Leptaxis vetusa | Portugal |
| 418. | Leptaxis wollastoni | Leptaxis wollastoni | Portugal |
| 419. | Leptaxis furva | Leptaxis furva | Portugal |
| 420. | Leptaxis terceirana | Leptaxis terceirana | Portugal |
| 421. | Leuchocharis pancheri | Leuchocharis pancheri | New Caledonia |
| 422. | Liardetia boninensis | Liardetia boninensis | Japan |
| 423. | Lily Shoals Elimia | Elimia annettae | Alabama |
| 424. | Lobaunia danubialis | Lobaunia danubialis | Austria |
| 425. | Lord Howe Flax Snail | Placostylus bivaricosus | Australia |
| 426. | Lutilodix imitratrix | Lutilodix imitratrix | Indian Ocean (Norfolk Islands) |
| 427. | Magazine Mountain Middle-toothed Snail | Inflectarius magazinensis | Arkansas |
| 428. | Manus Island Tree Snail | Papustyla pulcherrima | Pacific Ocean - Admiralty Island (Manus Island) |
| 429. | Marbled Disc | Discus marmorensis | Idaho, Iowa |
| 430. | Martelia tanganyicensis | Martelia tanganyicensis | Democratic Republic of Congo (Zaire), Tanzania |
| 431. | Mathewsoconcha belli | Mathewsoconcha belli | Indian Ocean (Norfolk Islands) |
| 432. | Mautodontha boraborensis | Mautodontha boraborensis | French Polynesia |
| 433. | Mautodontha ceuthma | Mautodontha ceuthma | French Polynesia |
| 434. | Megalobulimus fragilion | Megalobulimus fragilion | Brazil |
| 435. | Megalobulimus grandis | Megalobulimus grandis | Brazil |
| 436. | Megalobulimus lopesi | Megalobulimus lopesi | Brazil |
| 437. | Megalobulimus parafragilior | Megalobulimus parafragilior | Brazil |
| 438. | Megalobulimus proclivis | Megalobulimus proclivis | Brazil |
| 439. | Meridolum corneovirens | Meridolum corneovirens | Australia |
| 440. | Microstrophia modesta | Microstrophia modesta | Mauritius |
| 441. | Miller's Snail | Cochliopina milleri | Mexico |
| 442. | Mitchell's Rainforest Snail | Thersites mitchellae | Australia (New South Wales) |
| 443. | Moapa Pebblesnail | Pyrgulopsis avernalis | Nevada |
| 444. | Moom Pebblesnail | Somatogyrus obtusus | Alabama |
| 445. | Morro Shoulderband Snail | Helminthoglypta walkeriana | California |
| 446. | Mouldingia orientalis | Mouldingia orientalis | Australia |
| 447. | Muddy Rocksnail | Lithasia salebrosa | Alabama, Kentucky, Tennessee |
| 448. | Napaeus isletae | Napaeus isletae | Spain (Canary Islands) |
| 449. | Neoplanorbis tantillus | Neoplanorbis tantillus | Alabama |
| 450. | Neritina tiassalensis | Neritina tiassalensis | Cote d'Ivoire |
| 451. | Newcomb's Tree Snail | Newcombia canaliculata | Hawaii |
| 452. | Newcomb's Tree Snail | Newcombia cumingi | Hawaii |
| 453. | Newcomb's Tree Snail | Newcombia lirata | Hawaii |
| 454. | Newcomb's Tree Snail | Newcombia perkinsi | Hawaii |
| 455. | Newcomb's Tree Snail | Newcombia pfeifferi | Hawaii |
| 456. | Newcomb's Tree Snail | Newcombia sulcata | Hawaii |
| 457. | Northern Abalone | Haliotis kamtschatkana | Alaska, California, Canada (British Columbia), Oregon, Washington |
| 458. | Notopala sublineata | Notopala sublineata | Australia |
| 459. | O'ahu Tree Snail  | Achatinella abbreviata | Hawaii |
| 460. | O'ahu Tree Snail | Achatinella apexfulva | Hawaii |
| 461. | O'ahu Tree Snail | Achatinella bellula | Hawaii |
| 462. | O'ahu Tree Snail | Achatinella buddii | Hawaii |
| 463. | O'ahu Tree Snail | Achatinella bulimoides | Hawaii |
| 464. | O'ahu Tree Snail | Achatinella byronii | Hawaii |
| 465. | O'ahu Tree Snail | Achatinella caesia | Hawaii |
| 466. | O'ahu Tree Snail | Achatinella casta | Hawaii |
| 467. | O'ahu Tree Snail | Achatinella cestus | Hawaii |
| 468. | O'ahu Tree Snail | Achatinella concavospira | Hawaii |
| 469. | O'ahu Tree Snail | Achatinella curta | Hawaii |
| 470. | O'ahu Tree Snail | Achatinella decipiens | Hawaii |
| 471. | O'ahu Tree Snail | Achatinella decora | Hawaii |
| 472. | O'ahu Tree Snail | Achatinella dimorpha | Hawaii |
| 473. | O'ahu Tree Snail | Achatinella elegans | Hawaii |
| 474. | O'ahu Tree Snail | Achatinella leucorraphe | Hawaii |
| 475. | O'ahu Tree Snail | Achatinella fulgens | Hawaii |
| 476. | O'ahu Tree Snail | Achatinella fuscobasis | Hawaii |
| 477. | O'ahu Tree Snail | Achatinella juddii | Hawaii |
| 478. | O'ahu Tree Snail | Achatinella juncea | Hawaii |
| 479. | O'ahu Tree Snail | Achatinella lehuiensis | Hawaii |
| 480. | O'ahu Tree Snail | Achatinella lila | Hawaii |
| 481. | O'ahu Tree Snail | Achatinella livida | Hawaii |
| 482. | O'ahu Tree Snail | Achatinella lorata | Hawaii |
| 483. | O'ahu Tree Snail | Achatinella mustelina | Hawaii |
| 484. | O'ahu Tree Snail | Achatinella papyracea | Hawaii |
| 485. | O'ahu Tree Snail | Achatinella phaeozona | Hawaii |
| 486. | O'ahu Tree Snail | Achatinella pulcherrima | Hawaii |
| 487. | O'ahu Tree Snail | Achatinella pupukanioe | Hawaii |
| 488. | O'ahu Tree Snail | Achatinella rosea | Hawaii |
| 489. | O'ahu Tree Snail | Achatinella sowerbyana | Hawaii |
| 490. | O'ahu Tree Snail | Achatinella spaldingi | Hawaii |
| 491. | O'ahu Tree Snail | Achatinella stewartii | Hawaii |
| 492. | O'ahu Tree Snail | Achatinella taeniolata | Hawaii |
| 493. | O'ahu Tree Snail | Achatinella thaanumi | Hawaii |
| 494. | O'ahu Tree Snail | Achatinella turgida | Hawaii |
| 495. | O'ahu Tree Snail | Achatinella valida | Hawaii |
| 496. | O'ahu Tree Snail | Achatinella swiftii | Hawaii |
| 497. | O'ahu Tree Snail | Achatinella viridans | Hawaii |
| 498. | O'ahu Tree Snail | Achatinella vulpina | Hawaii |
| 499. | O'ahu Tree Snail | Achatinella vittata | Hawaii |
| 500. | Occirhenea georgiana | Occirhenea georgiana | Australia |
| 501. | Ocmulgee Marstonia | Pyrgulopsis agarhecta | Georgia |
| 502. | Ogasawarana chichijimana | Ogasawarana chichijimana | Japan |
| 503. | Ogasawarana habei | Ogasawarana habei | Japan |
| 504. | Ogasawarana metamorpha | Ogasawarana metamorpha | Japan |
| 505. | Ogasawarana rex | Ogasawarana rex | Japan |
| 506. | Ogasawarana yoshiwarana | Ogasawarana yoshiwarana | Japan |
| 507. | Omphalotropis hieroglyphica | Omphalotropis hieroglyphica | Mauritius |
| 508. | Opanara altiapica | Opanara altiapica | French Polynesia |
| 509. | Opanara areaensis | Opanara areaensis | French Polynesia |
| 510. | Opanara bitridentata | Opanara bitridentata | French Polynesia |
| 511. | Opanara caliculata | Opanara caliculata | French Polynesia |
| 512. | Opanara depasoapicata | Opanara depasoapicata | French Polynesia |
| 513. | Opanara duplicidentata | Opanara duplicidentata | French Polynesia |
| 514. | Opanara fosbergi | Opanara fosbergi | French Polynesia |
| 515. | Opanara megomphala | Opanara megomphala | French Polynesia |
| 516. | Opanara perahuensis | Opanara perahuensis | French Polynesia |
| 517. | Opaque Pebblesnail | Somatogyrus tennesseensis | Alabama, Tennessee |
| 518. | Opisthostoma decrespignyi | Opisthostoma decrespignyi | Malaysia |
| 519. | Opisthostoma dormani | Opisthostoma dormani | Malaysia |
| 520. | Opisthostoma fraternum | Opisthostoma fraternum | Malaysia |
| 521. | Opisthostoma inornatum | Opisthostoma inornatum | Malaysia |
| 522. | Opisthostoma jucundum | Opisthostoma jucundum | Malaysia |
| 523. | Opisthostoma mirabile | Opisthostoma mirabile | Malaysia |
| 524. | Opisthostoma otostoma | Opisthostoma otostoma | Malaysia |
| 525. | Opisthostoma perspectivum | Opisthostoma perspectivum | Malaysia |
| 526. | Opisthostoma simplex | Opisthostoma simplex | Malaysia |
| 527. | Orangia cookei | Orangia cookei | French Polynesia |
| 528. | Orangia maituatensis | Orangia maituatensis | French Polynesia |
| 529. | Orangia sporadica | Orangia sporadica | French Polynesia |
| 530. | Otway Black Snail | Victaphanta compacta | Australia |
| 531. | Ovate Pebblesnail | Somatogyrus excavatus | Alabama |
| 532. | Paludomus ajanensis | Paludomus ajanensis | Indian Ocean (Seychelles) |
| 533. | Panhandle Pebblesnail | Somatogyrus virginicus | North Carolina, Virginia |
| 534. | Parmacella tenerifensis | Parmacella tenerifensis | Spain |
| 535. | Partula Snail | Partula calypso | Palau |
| 536. | Partula Snail | Partula clara | French Polynesia |
| 537. | Partula Snail | Partula dentifera | French Polynesia |
| 538. | Partula Snail | Partula emersoni | Federated States of Micronesia |
| 539. | Partula Snail | Partula faba | French Polynesia |
| 540. | Partula Snail | Partula filosa | French Polynesia |
| 541. | Partula Snail | Partula garretti | French Polynesia |
| 542. | Partula Snail | Partula gibba | Guam, Northern Mariana Islands |
| 543. | Partula Snail | Partula guamensis | Federated States of Micronesia |
| 544. | Partula Snail | Partula hebe | French Polynesia |
| 545. | Partula Snail | Partula hyalina | French Polynesia |
| 546. | Partula Snail | Partula labrusca | French Polynesia |
| 547. | Partula Snail | Partula langfordi | Northern Mariana Islands |
| 548. | Partula Snail | Partula leucothoe | Palau |
| 549. | Partula Snail | Partula martensiana | Federated States of Micronesia |
| 550. | Partula Snail | Partula mirabilis | French Polynesia |
| 551. | Partula Snail | Partula mooreana | French Polynesia |
| 552. | Partula Snail | Partula otaheitana | French Polynesia |
| 553. | Partula Snail | Partula radiolata | Guam |
| 554. | Partula Snail | Partula rosea | French Polynesia |
| 555. | Partula Snail | Partula suturalis | French Polynesia |
| 556. | Partula Snail | Partula taeniata | French Polynesia |
| 557. | Partula Snail | Partula thetis | Palau |
| 558. | Partula Snail | Partula tohiveana | French Polynesia |
| 559. | Partula Snail | Partula tristis | French Polynesia |
| 560. | Partula Snail | Partula varia | French Polynesia |
| 561. | Partulina confusa | Partulina confusa | Hawaii |
| 562. | Partulina dubia | Partulina dubia | Hawaii |
| 563. | Partulina mighelsiana | Partulina mighelsiana | Hawaii |
| 564. | Partulina perdix | Partulina perdix | Hawaii |
| 565. | Partulina physa | Partulina physa | Hawaii |
| 566. | Partulina proxima | Partulina proxima | Hawaii |
| 567. | Partulina redfieldi | Partulina redfieldi | Hawaii |
| 568. | Partulina semicarinata | Partulina semicarinata | Hawaii |
| 569. | Partulina splendida | Partulina splendida | Hawaii |
| 570. | Partulina tappaniana | Partulina tappaniana | Hawaii |
| 571. | Partulina tessellata | Partulina tessellata | Hawaii |
| 572. | Partulina variabilis | Partulina variabilis | Hawaii |
| 573. | Pecos Assiminea Snail | Assiminea pecos | Mexico, New Mexico, Texas |
| 574. | Pene galilaea | Pene galilaea | Israel |
| 575. | Perdicella helena | Perdicella helena | Hawaii |
| 576. | Phantom Cave Snail | Cochliopa texana | Texas |
| 577. | Plicate Rocksnail | Leptoxis plicata | Alabama |
| 578. | Pondoland Cannibal Snail | Natalina beyrichi | South Africa (Eastern Cape Province) |
| 579. | Ptychodon schuppi | Ptychodon schuppi | Brazil |
| 580. | Pulmonate Limpet | Siphonaria compressa | South Africa |
| 581. | Purcell's Hunter Slug | Chlamydephorus purcelli | South Africa (Western Cape Province) |
| 582. | Pygmy Pebblesnail | Somatogyrus pygmaeus | Alabama |
| 583. | Quadrate Pebblesnail | Somatogyrus quadratus | Alabama |
| 584. | Radioconus riochcoensis | Radioconus riochcoensis | Brazil |
| 585. | Radioconus goeldi | Radioconus goeldi | Brazil |
| 586. | Radiodiscus amdenus | Radiodiscus amdenus | Brazil |
| 587. | Rhysoconcha variumbilicata | Rhysoconcha variumbilicata | French Polynesia |
| 588. | Rhytida oconnori | Rhytida oconnori | New Zealand |
| 589. | Rhytida clarki | Rhytida clarki | New Zealand |
| 590. | Rocky Mountain Capshell | Acroloxus coloradensis | Canada, United States |
| 591. | Rolling Pebblesnail | Somatogyrus strengi | Alabama |
| 592. | Roswell Springsnail | Pyrgulopsis roswellensis | New Mexico |
| 593. | Round Rocksnail | Elimia ampla | Alabama |
| 594. | Royal Marstonia Snail | Pyrgulopsis ogmorhaphe | Tennessee |
| 595. | Ruatara koarana | Ruatara koarana | French Polynesia |
| 596. | Samoan Tree Snail | Samoana thurstoni | American Samoa |
| 597. | Samoan Tree Snail | Samoana solitaria | French Polynesia |
| 598. | Samoan Tree Snail | Samoana fragilis | Guam |
| 599. | Samoan Tree Snail | Samoana diaphana | French Guiana |
| 600. | Samoan Tree Snail | Samoana conica | American Samoa |
| 601. | Samoan Tree Snail | Samoana attenuata | French Polynesia |
| 602. | Samoan Tree Snail | Samoana annectens | French Polynesia |
| 603. | Samoan Tree Snail | Samoana abbreviata | American Samoa |
| 604. | Scottsdale Freshwater Snail | Beddomeia minima | Australia |
| 605. | Slender Campeloma | Campeloma decampi | Alabama |
| 606. | Snake River Physa Snail | Physa natricina | Idaho |
| 607. | Snake Skin Hunter Slug | Chlamydephorus dimidius | South Africa (KwaZulu-Natal) |
| 608. | Socorro Springsnail | Pyrgulopsis neomexicana | New Mexico |
| 609. | Spiny River Snail | Io fluvialis | Alabama, Tennessee, Virginia |
| 610. | Stanleya neritinoides | Stanleya neritinoides | Democratic Republic of Congo (Zaire), Tanzania |
| 611. | Stocky Pebblesnail | Somatogyrus crassus | Alabama |
| 612. | Subuliniscus arambourgi | Subuliniscus arambourgi | Kenya |
| 613. | Succinea piratarum | Succinea piratarum | Guam |
| 614. | Succinea quadrasi | Succinea quadrasi | Guam |
| 615. | Table Cape Freshwater Snail | Beddomeia capensis | Australia |
| 616. | Tacheocampylaea tacheoides | Tacheocampylaea tacheoides | Italy |
| 617. | Tennessee Pebblesnail | Somatogyrus currierianus | Alabama |
| 618. | Thapsia buraensis | Thapsia buraensis | Kenya |
| 619. | Thapsia snelli | Thapsia snelli | Mauritius (Rodrigues Islands) |
| 620. | Thaumatodon hystricelloides | Thaumatodon hystricelloides | Samoa |
| 621. | Thickshell Pondsnail | Stagnicola utahensis | Utah |
| 622. | Tight Coin | Ammonitella yatesii | California |
| 623. | Tomicha cawstoni | Tomicha cawstoni | South Africa |
| 624. | Tomicha natalensis | Tomicha natalensis | South Africa |
| 625. | Tomicha rogersi | Tomicha rogersi | South Africa |
| 626. | Tomichia cawstoni | Tomichia cawstoni | South Africa |
| 627. | Tomichia differens | Tomichia differens | South Africa |
| 628. | Tomichia natalensis | Tomichia natalensis | South Africa |
| 629. | Tomichia tristis | Tomichia tristis | South Africa |
| 630. | Tomichia ventricosa | Tomichia ventricosa | South Africa |
| 631. | Tomichia zwellendamensis | Tomichia zwellendamensis | South Africa |
| 632. | Trachycystis clifdeni | Trachycystis clifdeni | South Africa |
| 633. | Trachycystis haygarthi | Trachycystis haygarthi | South Africa |
| 634. | Trachycystis placenta | Trachycystis placenta | South Africa |
| 635. | Transverse Grand Pyrg | Pyrgulopsis cruciglans | Nevada |
| 636. | Tricula montana | Tricula montana | India |
| 637. | Trochidrobia inflata | Trochidrobia inflata | Australia |
| 638. | Trochochlamys ogasawarana | Trochochlamys ogasawarana | Japan |
| 639. | Trochoidea pseudojacosta | Trochoidea pseudojacosta | Israel |
| 640. | Trochomorpha apia | Trochomorpha apia | American Samoa |
| 641. | Tropidophora articulata | Tropidophora articulata | Mauritius (Rodrigues Islands) |
| 642. | Tropidophora deburghiae | Tropidophora deburghiae | Madagascar |
| 643. | Tropidoptera heliciformis | Tropidoptera heliciformis | Hawaii |
| 644. | Truncatellina arcyensis | Truncatellina arcyensis | France |
| 645. | Tulotoma Snail | Tulotoma magnifica | Alabama |
| 646. | Upper Castra Freshwater Snail | Beddomeia fallax | Australia |
| 647. | Utah Valvata Snail | Valvata utahensis | Idaho |
| 648. | Varicose Rocksnail | Lithasia verrucosa | United States |
| 649. | Virginia Fringed Mountain Snail | Polygyriscus virginianus | Virginia |
| 650. | Wekiwa Hydrobe | Aphaostracon monas | Florida |
| 651. | White Abalone | Haliotis sorenseni | North America (West Coast from Point Conception, CA, USA, to Punta Abreojos, Baja Californa, Mexico) |
| 652. | Xerosecta giustii | Xerosecta giustii | Italy |
| 653. | Zilchogyra paulistana | Zilchogyra paulistana | Brazil |
| 654. | Zingis radiolata | Zingis radiolata | Kenya |
| 655. | Zonitoides jaccetanicus | Zonitoides jaccetanicus | Spain |
