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As of September 2016, the International Union for Conservation of Nature (IUCN) lists 1988 data deficient mollusc species.[1] 27% of all evaluated mollusc species are listed as data deficient. The IUCN also lists 40 mollusc subspecies as data deficient.

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 data deficient mollusc species and subspecies evaluated by the IUCN.


Gastropods


There are 1526 species and 37 subspecies of gastropod evaluated as data deficient.


Vetigastropoda



Stylommatophora


Stylommatophora includes the majority of land snails and slugs. There are 392 species and 32 subspecies in the order Stylommatophora evaluated as data deficient.


Partulids


Subulinids

Species

Subspecies


Achatinellids


Endodontids


Charopids


Helicarionids


Orthalicids


Euconulids


Rhytidids


Streptaxids

Species

Subspecies


Zonitids


Pupillids


Polygyrids

Species

Subspecies


Helminthoglyptids

Species

Subspecies


Camaenids


Lauriids


Vertiginids


Bradybaenids

Species

Subspecies


Helicids


Hygromiids


Enids


Other Stylommatophora

Species

Subspecies


Littorinimorpha


There are 565 species and one subspecies in the order Littorinimorpha evaluated as data deficient.


Strombids


Pomatiids


Hydrobiids


Cochliopids


Bithyniids

Species

Subspecies


Moitessieriids


Assimineids


Pomatiopsids


Lithoglyphids


Amnicolids


Stenothyrids


Iravadiids


Truncatellids


Sorbeoconcha


There are 97 species and one subspecies in the order Sorbeoconcha evaluated as data deficient.


Batillarids


Pleurocerids


Melanopsids


Semisulcospirids


Thiarids


Pachychilids


Paludomids

Species

Subspecies


Architaenioglossa


There are 106 species and one subspecies in the order Architaenioglossa evaluated as data deficient.


Neocyclotids


Cyclophorids

Species

Subspecies


Pupinids


Diplommatinids


Aciculids


Viviparids


Ampullariids


Lower Heterobranchia species



Cycloneritimorpha


There are 30 species and two subspecies in the order Cycloneritimorpha evaluated as data deficient.


Helicinids

Species

Subspecies


Hydrocenids


Neritids


Hygrophila species


There are 197 Hygrophila species evaluated as data deficient.


Physids


Acroloxids


Planorbids


Lymnaeids


Chilinids


Latiids


Neogastropoda


There are 113 species in the order Neogastropoda evaluated as data deficient.


Turrids


Marginellids


Buccinids


Muricids


Conids


Eupulmonata



Archaeopulmonata



Bivalvia


There are 171 species and three subspecies in the class Bivalvia evaluated as data deficient.


Pectinida



Unionida


There are 95 species in the order Unionoida evaluated as data deficient.


Margaritiferids


Unionids


Hyriids


Iridinids


Mycetopodids


Venerida


There are 74 species and three subspecies in the order Veneroida evaluated as data deficient.


Dreissenids


Sphaeriids

Species

Subspecies


Cyrenids

Species

Subspecies


Donacids


Solecurtids


Mytilida



Cephalopods


There are 291 cephalopod species evaluated as data deficient.


Idiosepiida



Octopuses


There are 34 octopus species evaluated as data deficient.


Umbrella octopuses


Argonautids


Cirroteuthids


Grimpoteuthis species


Sepioloida


There are 142 species in Sepioloida evaluated as data deficient.


Sepiids


Sepiolids


Sepiadariids


Oegopsina species


There are 104 Oegopsina species evaluated as data deficient.


Mastigoteuthidae


Enoploteuthids


Hooked squids


Chiroteuthids


Cranchiids


Octopoteuthids


Other Oegopsina species


Bathyteuthida



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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