Biology:List of critically endangered molluscs

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

As of September 2016, the International Union for Conservation of Nature (IUCN) listed 581 critically endangered mollusc species, including 117 which are tagged as possibly extinct.[1][2] Of all evaluated mollusc species, 8.0% 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 1988 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 evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

There are 511 species and six subspecies of gastropod assessed as critically endangered.

Stylommatophora includes the majority of land snails and slugs. There are 233 species and five subspecies in the order Stylommatophora assessed as critically endangered.

Species

Subspecies


Other Stylommatophora species

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

  • Henrigirardia wienini (possibly extinct)
  • Spiralix corsica (possibly extinct)

There are 48 species in the order Architaenioglossa assessed as critically endangered.

Other Architaenioglossa species

Species

Subspecies

  • Bulinus tropicus torensis

Other gastropod species

There are 69 species and five subspecies in the class Bivalvia assessed as critically endangered.

There are 66 species and five subspecies in the order Unionoida assessed as critically endangered.

Species

Subspecies

  • Margaritifera margaritifera durrovensis
  • Acostaea rivolii

Species

Subspecies


See also

References

  1. "IUCN Red List version 2016-2". International Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/. Retrieved 8 September 2016. 
  2. "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2016-2)". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/about/summary-statistics. Retrieved 8 September 2016. 
  3. "Limitations of the Data". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/initiatives/mammals/description/limitations. Retrieved 11 January 2016. 
  4. "2001 Categories & Criteria (version 3.1)". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/static/categories_criteria_3_1. Retrieved 11 January 2016.