List of critically endangered molluscs

Add links
Source: Wikipedia, the free encyclopedia.

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[a]
  • 2972 are not threatened at present[b]
  • 1967 to 3955 are threatened[c]
  • 324 to 441 are extinct or extinct in the wild:
    • 311 extinct (EX) species[d]
    • 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
Critically endangered (CR) species face an extremely high risk of extinction in the wild.

As of September 2016, the

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.

Gastropods

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

Stylommatophora

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

Amastrids

Partulids

Achatinellids

Endodontids

Species

Subspecies

Charopids

Helicarionids

Orthalicids

Rhytidids

Streptaxids

Lauriids

Helicids

Hygromiids

Enids

Other Stylommatophora species

Littorinimorpha

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

Hydrobiids

Cochliopids

Bithyniids

Moitessieriids

Assimineids

Pomatiopsids

Sorbeoconcha

Architaenioglossa

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

Cyclophorids

Diplommatinids

Viviparids

Other Architaenioglossa species

Cycloneritimorpha

Hygrophila

Species

Subspecies

Neogastropoda

Other gastropod species

Bivalvia

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

Unionida

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

Margaritiferids

Species

Subspecies

  • Margaritifera margaritifera durrovensis

Etheriids

Unionids

Species

Subspecies

  • Curtis' naiad (Epioblasma florentina curtisi)
  • Brown-blossom naiad
    (Epioblasma florentina walkeri)
  • White catspaw
    (Epioblasma obliquata perobliqua)
  • Northern riffleshell
    (Epioblasma torulosa rangiana)

Hyriids

Venerida

Cephalopods

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.
  2. ^ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2016-2)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 8 September 2016.
  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.


Retrieved from "https://en.wikipedia.org/w/index.php?title=List_of_critically_endangered_molluscs&oldid=1137312016"