There are 267 extinct species, 134 possibly extinct species, 14 extinct in the wild species, two possibly extinct in the wild species, five extinct subspecies, one possibly extinct subspecies, and five extinct in the wild subspecies of gastropod evaluated by the IUCN. ===
Patellogastropoda===
Extinct species •
Collisella edmitchelli •
Eelgrass limpet (Lottia alveus) ===
Stylommatophora===
Extinct species Possibly extinct species Extinct in the wild species Extinct subspecies Extinct in the wild subspecies ===
Littorinimorpha===
Extinct species Possibly extinct species ===
Sorbeoconcha===
Extinct species Possibly extinct species Extinct in the wild species ===
Architaenioglossa===
Extinct species Possibly extinct species ===
Cycloneritimorpha===
Possibly extinct species •
Neritina tiassalensis ===
Hygrophila species===
Extinct species Possibly extinct species •
Thickshell pondsnail (Stagnicola utahensis) ==
Bivalvia==