List of endangered molluscs

Extinct, since 1500: 310 species Extinct in the wild (EW): 14 species Critically endangered (CR): 576 species Endangered (EN): 503 species Vulnerable (VU): 871 species Near threatened (NT, LR/cd): 534 species Least concern (LC): 2,429 species Data deficient (DD): 1,979 speciesCircle frame.svg
  •   Extinct, since 1500: 310 species
  •   Extinct in the wild (EW): 14 species
  •   Critically endangered (CR): 576 species
  •   Endangered (EN): 503 species
  •   Vulnerable (VU): 871 species
  •   Near threatened (NT, LR/cd): 534 species
  •   Least concern (LC): 2,429 species
  •   Data deficient (DD): 1,979 species
Mollusc species (IUCN, 2015.4)
  • 7216 species have been evaluated
  • 5237 are fully assessed (excludes DD)
  • 2963 are not threatened at present (LC, NT, LR/cd)
  • 1950 are threatened (CR, EN, VU)
  • 324 to 441 are extinct or extinct in the wild (EX, EW, CR(PE), CR(PEW))
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild.

As of February 2016, the International Union for Conservation of Nature (IUCN) lists 503 endangered mollusc species.[1] 7.0% of all evaluated mollusc species are listed as endangered. The IUCN also lists nine mollusc subspecies as endangered.

No subpopulations of molluscs have been evaluated by the IUCN.

For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of exintction". An even higher risk is faced by critically endangered species, which are listed separately (List of critically endangered molluscs) even though they also meet the quantitative criteria for endangered species. There are 1079 mollusc species which are endangered or critically endangered.

Additionally 1979 mollusc species (27% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN.[2] While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed."[3]

This is a complete list of endangered mollusc species and subspecies as evaluated by the IUCN. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.

Gastropoda

There are 444 species and seven subspecies in the class Gastropoda assessed as endangered.

Stylommatophora

There are 185 species and two subspecies in the order Stylommatophora assessed as endangered. Stylommatophora includes the majority of land snails and slugs.

Partulids

Achatinellids

Endodontids

Charopids

Helicarionids

Orthalicids

Species

Subspecies

Euconulids

Streptaxids

Species

Subspecies

Camaenids

Helicids

Hygromiids

Other Stylommatophora species

Littorinimorpha

There are 147 species and three subspecies in the order Littorinimorpha assessed as endangered.

Hydrobiids

Bithyniids

Species

  • Bithynia pesicii
  • Bithynia prespensis
  • Bithynia skadarskii
  • Bithynia zeta
  • Funduella incisa
  • Gabbiella barthi
  • Gabbiella spiralis
  • Gabbiella tchadiensis
  • Gabbiella verdcourti
  • Liminitesta sulcata
  • Pseudobithynia levantica
  • Pseudobithynia trichonis

Subspecies

  • Gabbiella humerosa alberti
  • Gabbiella humerosa edwardi
  • Gabbiella humerosa kyogae

Other Littorinimorpha species

Sorbeoconcha

Architaenioglossa

Species

Subspecies

Hygrophila

There are 22 species in Hygrophila assessed as endangered.

Planorbids

Lymnaeids

  • Lymnaea maroccana
  • Radix pinteri
  • Radix skutaris
  • Shortspire pondsnail
  • Stagnicola kayseris

Neogastropoda

Other Gastropoda species

Bivalvia

There are 57 species and two subspecies in the class Bivalvia assessed as endangered.

Unionoida

There are 54 species and two subspecies in the order Unionoida assessed as endangered.

Unionids

Species

Subspecies

Other Unionoida species

Veneroida

  • Corbicula possoensis
  • Pisidium edlaueri
  • Pisidium maasseni

Cephalopods

See also

References

  1. ↑ "IUCN Red List version 2015.4". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 19 February 2016.
  2. ↑ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
  3. ↑ "2001 Categories & Criteria (version 3.1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
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