List of critically endangered molluscs


As of September 2016, the International Union for Conservation of Nature lists 581 critically endangered mollusc species, including 117 which are tagged as possibly extinct. 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 1988 mollusc species 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. 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."
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">Gastropoda">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">Amastridae">Amastrids

Partulids">Partulidae">Partulids

Achatinellids">Achatinellidae">Achatinellids

Endodontids">Endodontidae">Endodontids

Species
Subspecies

Charopids">Charopidae">Charopids

Helicarionids">Helicarionidae">Helicarionids

Orthalicids">Orthalicidae">Orthalicids

Rhytidids">Rhytididae">Rhytidids

Streptaxids">Streptaxidae">Streptaxids

Lauriids">Lauriidae">Lauriids

Helicids">Helicidae">Helicids

Hygromiids">Hygromiidae">Hygromiids

Enids">Enidae">Enids

Other Stylommatophora species

[Littorinimorpha]

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

Hydrobiids">Hydrobiidae">Hydrobiids

Cochliopids">Cochliopidae">Cochliopids

Bithyniids">Bithyniidae">Bithyniids

Moitessieriids">Moitessieriidae">Moitessieriids

Pomatiopsids">Pomatiopsidae">Pomatiopsids

[Sorbeoconcha]

[Architaenioglossa]

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

Cyclophorids">Cyclophoridae">Cyclophorids

Diplommatinids">Diplommatinidae">Diplommatinids

Viviparids">Viviparidae">Viviparids

Other Architaenioglossa species

[Cycloneritimorpha]

Hygrophila">Hygrophila (gastropod)">Hygrophila

Species
Subspecies

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">Margaritiferidae">Margaritiferids

Species
Subspecies
Species
Subspecies

Hyriids">Hyriidae">Hyriids

Cephalopods">Cephalopoda">Cephalopods