Many molluscs have already disappeared from this earth. And many will follow them if we don't protect them and their habitats better. The 2008 IUCN Red List of Threatened Species has listed 296 molluscs as extinct since 1500 AD. These molluscs consist of 257 snail species and 5 snail subspecies (Gastropoda), and 31 bivalve species and 3 bivalve subspecies (Bivalvia). The subjoined list contains 270 snail species and 8 snail subspecies, and 31 bivalve species and 3 bivalve subspecies.

Tuesday 3 May 2005, a news release from The Nature Conservancy indicated that three snail species have been rediscovered. The cobble elimia (Elimia vanuxemiana) and the Nodulose Coosa River snail (Elimia lachryma) were rediscovered in the Coosa River by Jeff Garner of the Alabama Department of Conservation and Natural Resources. The Cahaba pebblesnail (Clappia cahabensis) had been rediscovered by Stephanie Clark, a postdoctoral student, in the Cahaba River south of Birmingham (Alabama, USA). These species have been removed from the subjoined list, but the 2007 IUCN Red List still classifies them as extinct. According to the IUCN the rediscovery requires confirmation before the species status can be reassessed, but it is likely to be Critically Endangered.

EX

EX

Alasmidonta robusta

Achatinella decora

Achatinella livida  

Caldwellia philyrina  

Carelia dolei  

Carelia knudseni

Carelia periscelis

Gyrotoma excisa

Achatinella apexfulva vittata