List of endangered molluscs on:
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As of September 2016, the
Species
Subspecies
*'' Orthalicus reses reses'' (Stock Island tree snail)
Species
Subspecies
*'' Tayloria urguessensis subangulata''
Species
Subspecies
Species
Subspecies
*'' Bellamya unicolor abyssinicus''
*'' Maizania hildebrandti thikensis''
Species
Subspecies
* Catspaw ''(Epioblasma obliquata obliquata)''
* Rough rabbitsfoot ''(Quadrula cylindrica strigillata)''
*'' Cirroctopus hochbergi''
*''
As of September 2016, the International Union for Conservation of Nature
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of nat ...
(IUCN) lists 507 endangered
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...
mollusc species. 7.0% of all evaluated mollusc species are listed as endangered.
The IUCN also lists nine mollusc subspecies as endangered.
No subpopulations of molluscs have been evaluated by the IUCN.
For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of exintction". An even higher risk is faced by ''critically endangered'' species, which meet the quantitative criteria for endangered species. Critically endangered molluscs are listed separately. There are 1088 mollusc species which are endangered or critically endangered.
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. 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 endangered mollusc species and subspecies evaluated by the IUCN.
Gastropods
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda ().
This class comprises snails and slugs from saltwater, from freshwater, and from land. The ...
There are 448 species and seven subspecies of gastropod assessed as endangered.Stylommatophora
Stylommatophora is a very diverse group that includes the majority of land snails and slugs. There are 187 species and two subspecies in the order Stylommatophora assessed as endangered.
Other stylommatophoran species
Littorinimorpha
There are 147 littorinimorph species and three subspecies assessed as endangered.
Other Littorinimorpha species
Hygrophila species
There are 22 Hygrophila species assessed as endangered.Other gastropod species
Bivalvia
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, biva ...
There are 57 species and two subspecies in the class Bivalvia assessed as endangered.
Unionida
Unionida is a monophyletic order of freshwater mussels, aquatic bivalve molluscs.Bieler R., Carter J.G. & Coan E.V. (2010). ''Classification of Bivalve families''. pp. 113–133, in: Bouchet P. & Rocroi J.-P. (2010), ''Nomenclator of Bivalve Fa ...
There are 54 species and two subspecies in the order Unionoida assessed as endangered.Other Unionida species
Venerida
Venerida (formerly Veneroida) is an order of mostly saltwater but also some freshwater bivalve molluscs. This order includes many familiar groups such as many clams that are valued for food and a number of freshwater bivalves.
Since the 2000s, t ...
Opisthoteuthis mero
''Opisthoteuthis mero'' is a species of Cirrina, cirrate octopus from demersal habitats surrounding New Zealand. ''O. mero'' is the most documented New Zealand ''Opisthoteuthis'' species, with over 100 reference specimens. ''O. mero'' reaches a m ...
''
See also
*Lists of IUCN Red List endangered species
On 29 January 2010, the IUCN Red List of Threatened Species identified 5220 (2754 animals, 1 fungus, 2464 plant, 1 protist) endangered species, subspecies and varieties, stocks and sub-populations.
For IUCN lists of endangered species by kingdom, ...
* List of least concern molluscs
* List of near threatened molluscs
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 535 near threatened mollusc species. 7.4% of all evaluated mollusc species are listed as near threatened.
The IUCN also lists nine mollusc subspecies as nea ...
* List of vulnerable molluscs
* List of critically endangered molluscs
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 581 critically endangered mollusc species, including 117 which are tagged as ''possibly extinct''. 8.0% of all evaluated mollusc species are listed as criti ...
* List of recently extinct molluscs
* List of data deficient molluscs
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 1988 data deficient mollusc species. 27% of all evaluated mollusc species are listed as data deficient.
The IUCN also lists 40 mollusc subspecies as data def ...
References
*Molluscs Endangered molluscs {{bots, deny=BG19bot,Yobot