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As of September 2016, the International Union for Conservation of Nature (IUCN) lists 535 near threatened mollusc species.[1] 7.4% of all evaluated mollusc species are listed as near threatened. The IUCN also lists nine mollusc subspecies as near threatened.

14 extinct in the wild mollusc species (0.20%)581 critically endangered mollusc species (8.4%)507 endangered mollusc species (7.3%)879 vulnerable mollusc species (13%)535 near threatened mollusc species (7.7%)2437 least concern mollusc species (35%)1988 data deficient mollusc species (29%)
Mollusc species (IUCN, 2020.1)
  • 6941 extant species have been evaluated
  • 4953 of those are fully assessed[lower-alpha 1]
  • 2972 are not threatened at present[lower-alpha 2]
  • 1967 to 3955 are threatened[lower-alpha 3]
  • 324 to 441 are extinct or extinct in the wild:
    • 311 extinct (EX) species[lower-alpha 4]
    • 13 extinct in the wild (EW)
    • 117 possibly extinct [CR(PE)]
    • 0 possibly extinct in the wild [CR(PEW)]
  1. excludes data deficient evaluations.
  2. NT, LR/cd, LC.
  3. Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
  4. Chart omits extinct (EX) species
Near Threatened (NT) species do not currently qualify for Critically Endangered (CR), Endangered (EN) or Vulnerable (VU), but are likely to qualify for a threatened category in the near future, or are already close to qualifying.
Near Threatened (NT) species do not currently qualify for Critically Endangered (CR), Endangered (EN) or Vulnerable (VU), but are likely to qualify for a threatened category in the near future, or are already close to qualifying.

No subpopulations of molluscs have been evaluated by the IUCN.

This is a complete list of near threatened mollusc species and subspecies evaluated by the IUCN.


Gastropods


There are 477 species and four subspecies of gastropod assessed as near threatened.


Stylommatophora


Stylommatophora includes the majority of land snails and slugs. There are 250 species and four subspecies in the order Stylommatophora assessed as near threatened.


Zonitids


Clausiliids

Species

Subspecies


Helminthoglyptids


Camaenids

Species

Subspecies


Vertiginids


Cochlicellids


Trissexodontids


Helicids


Hygromiids

Species

Subspecies


Vitrinids


Chondrinids


Enids


Argnids


Other Stylommatophora species


Littorinimorpha


There are 115 species in the order Littorinimorpha assessed as near threatened.


Hydrobiids


Bithyniids


Moitessieriids


Assimineids


Pomatiopsids


Stenothyrids


Sorbeoconcha



Architaenioglossa


There are 41 species in the order Architaenioglossa assessed as near threatened.


Pupinids


Diplommatinids


Aciculids


Viviparids


Ampullariids


Craspedopomatids


Lower Heterobranchia species



Cycloneritimorpha



Hygrophila species



Neogastropoda


There are 29 species in the order Neogastropoda assessed as near threatened.


Buccinids


Muricids


Conids


Bivalvia


There are 57 species and five subspecies in the class Bivalvia assessed as near threatened.


Unionida


There are 49 species and five subspecies in the order Unionoida assessed as near threatened.


Unionids

Species

Subspecies


Hyriids


Cardiida



Venerida



Cephalopods



See also



References


  1. "IUCN Red List version 2016-2". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 8 September 2016.


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