List of data deficient molluscs
In September 2016, the International Union for Conservation of Nature (IUCN) listed 1988 data deficient mollusc species. Of all evaluated mollusc species, 27% are listed as data deficient. The IUCN also lists 40 mollusc subspecies as data deficient. No subpopulations of molluscs have been evaluated by the IUCN. This is a complete list of data deficient mollusc species and subspecies evaluated by the IUCN.