Biology:List of critically endangered molluscs
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.
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
- Henrigirardia wienini (possibly extinct)
- Spiralix corsica (possibly extinct)
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
- Bulinus tropicus torensis
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
- Acostaea rivolii
Unionids
Species
Subspecies
Hyriids
- Glenelg freshwater mussel (Hyridella glenelgensis)
Venerida
Cephalopods
See also
- Lists of IUCN Red List critically endangered species
- List of least concern molluscs
- List of near threatened molluscs
- List of vulnerable molluscs
- List of endangered molluscs
- List of recently extinct molluscs
- List of data deficient molluscs
References
- ↑ "IUCN Red List version 2016-2". International Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/. Retrieved 8 September 2016.
- ↑ "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.
- ↑ "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.
- ↑ "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.
 |  |
