List of critically 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))
Critically Endangered (CR) species face an extremely high risk of extinction in the wild.

As of February 2016, the International Union for Conservation of Nature (IUCN) lists 576 critically endangered mollusc species, including 117 which are tagged as possibly extinct.[1][2] 8.0% of all evaluated mollusc species are listed as critically endangered. The IUCN also lists 11 mollusc subspecies as critically endangered.

No subpopulations of molluscs have been evaluated by the IUCN.

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.[3] 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."[4]

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

Gastropoda

There are 507 species and six subspecies in the class Gastropoda assessed as critically endangered.

Stylommatophora

There are 232 species and five subspecies in the order Stylommatophora assessed as critically endangered. Stylommatophora includes the majority of land snails and slugs.

Amastrids

Partulids

Achatinellids

Endodontids

Species

Subspecies

Charopids

Orthalicids

Streptaxids

Helicids

Hygromiids

Enids

Other Stylommatophora species

Littorinimorpha

There are 181 species in the order Littorinimorpha assessed as critically endangered.

Hydrobiids

Bithyniids

  • Bithynia kastorias
  • Gabbia alticola
  • Gabbiella candida
  • Gabbiella depressa
  • Gabbiella matadina (possibly extinct)
  • Gabbiella neothaumaeformis
  • Gabbiella parva
  • Incertihydrobia teesdalei
  • Jubaia aethiopica
  • Pseudobithynia euboeensis
  • Pseudobithynia falniowskii
  • Pseudobithynia kathrinae
  • Pseudobithynia panetolis
  • Sierraia outambensis
  • Soapitia dageti (possibly extinct)

Assimineids

  • Kubaryia pilikia (possibly extinct)
  • Omphalotropis ingens (possibly extinct)
  • Pseudogibbula cara (possibly extinct)
  • Pseudogibbula duponti
  • Septariellina congolensis
  • Valvatorbis mauritii (possibly extinct)

Other Littorinimorpha species

Sorbeoconcha

  • Pleurocera ampla
  • Lily Shoals elimia
  • Princess elimia
  • Mossy elimia (possibly extinct)
  • Leptoxis melanoides
  • Plicate rocksnail
  • Melanoides agglutinans (possibly extinct)
  • Melanopsis ammonis
  • Melanopsis brevicula
  • Melanopsis chlorotica
  • Melanopsis germaini (possibly extinct)
  • Melanopsis infracincta (possibly extinct)
  • Melanopsis khabourensis (possibly extinct)
  • Melanopsis pachya (possibly extinct)
  • Melanopsis parreyssii
  • Melanopsis penchinati
  • Melanopsis saharica
  • Corpulent hornsnail
  • Potadoma kadeii
  • Potadoma wansoni
  • Pseudocleopatra dartevellei
  • Tylomelania kruimeli

Architaenioglossa

There are 45 species in the order Architaenioglossa assessed as critically endangered.

Diplommatinids

Other Architaenioglossa species

Cycloneritimorpha

Hygrophila

Species

Subspecies

Other Gastropoda species

Bivalvia

There are 68 species and five subspecies in the class Bivalvia assessed as critically endangered.

Unionoida

There are 65 species and five subspecies in the order Unionoida assessed as critically endangered.

Margaritiferids

Species

Subspecies

Unionids

Species

Subspecies

Hyriids

Veneroida

  • Dreissena caspia (possibly extinct)
  • Eupera crassa
  • Pisidium ethiopicum

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. ↑ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2015.4)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 19 November 2015.
  3. ↑ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
  4. ↑ "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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