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As of September 2016, the International Union for Conservation of Nature (IUCN) lists 2437 least concern mollusc species.[1] 34% of all evaluated mollusc species are listed as least concern. The IUCN also lists five mollusc subspecies as least concern.

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

No subpopulations of molluscs have been evaluated by the IUCN.

This is a complete list of least concern mollusc species and subspecies evaluated by the IUCN.


Gastropods


There are 1944 species and three subspecies of gastropod assessed as least concern.


Stylommatophora


Stylommatophora includes the majority of land snails and slugs. There are 599 species and one subspecies in the order Stylommatophora assessed as least concern.


Charopids


Streptaxids


Lauriids


Vertiginids


Cochlicellids


Trissexodontids


Helicids

Species

Subspecies


Hygromiids


Vitrinids


Chondrinids


Enids


Argnids


Helicodontids


Orculids


Other Stylommatophora species


Littorinimorpha


There are 311 species and one subspecies in the order Littorinimorpha assessed as least concern.


Hydrobiids


Cochliopids


Bithyniids

Species

Subspecies


Moitessieriids


Assimineids


Pomatiopsids


Amnicolids


Stenothyrids


Iravadiids


Other Littorinimorpha species


Sorbeoconcha


There are 132 species and one subspecies in the order Sorbeoconcha assessed as least concern.


Pleurocerids


Melanopsids


Semisulcospirids


Thiarids


Pachychilids


Paludomids

Species

Subspecies


Potamidids


Architaenioglossa


There are 158 species in the order Architaenioglossa assessed as least concern.


Cyclophorids


Pupinids


Diplommatinids


Aciculids


Viviparids


Ampullariids


Craspedopomatids


Lower Heterobranchia species



Cycloneritimorpha


There are 40 species in the order Cycloneritimorpha assessed as least concern.


Helicinids


Neritids


Neritiliids


Hygrophila species


There are 188 Hygrophila species assessed as least concern.


Physids


Acroloxids


Planorbids


Lymnaeids


Chilinids


Latiids


Neogastropoda



Conids


Eupulmonata



Other gastropod species



Bivalvia


There are 296 species and two subspecies in the class Bivalvia assessed as least concern.


Unionida


There are 193 species and one subspecies in the order Unionoida assessed as least concern.


Etheriids


Unionids


Hyriids


Iridinids

Species

Subspecies


Mycetopodids


Cardiida



Arcida



Venerida


There are 96 species and one subspecies in the order Veneroida assessed as least concern.


Dreissenids


Sphaeriids


Cyrenids

Species

Subspecies


Donacids


Other Venerida species


Mytilida



Cephalopods


There are 197 cephalopod species assessed as least concern.


Octopuses



Sepioloida


There are 45 species in Sepioloida assessed as least concern.


Sepiids


Sepiolids


Sepiadariids


Oegopsina species


There are 126 Oegopsina species assessed as least concern.


Enoploteuthids


Hooked squids


Chiroteuthids


Cranchiids


Gonatids


Ommastrephids


Histioteuthids


Pyroteuthids


Other Oegopsina species


Bathyteuthida



Spirulida



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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