- Extinct in the wild (EW): 13 species
- Critically endangered (CR): 581 species
- Endangered (EN): 507 species
- Vulnerable (VU): 879 species
- Near threatened (NT, LR/cd): 535 species
- Least concern (LC): 2,437 species
- Data deficient (DD): 1,988 species
Mollusc species (IUCN, 2020.1)
- 6941 extant species have been evaluated
- 4953 of those are fully assessed [a]
- 2972 are not threatened at present [b]
- 1967 to 3955 are threatened [c]
- 324 to 441 are extinct or extinct in the wild:
- 311 extinct (EX) species [d]
- 13 extinct in the wild (EW)
- 117 possibly extinct [CR(PE)]
- 0 possibly extinct in the wild [CR(PEW)]
- ^ excludes data deficient evaluations.
- ^ NT, LR/cd, LC.
- ^ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
- ^ Chart omits extinct (EX) species
