List of vulnerable molluscs

Extinct, since 1500: 310 species Extinct in the wild (EW): 14 species Critically endangered (CR): 576 species Endangered (EN): 503 species Vulnerable (VU): 871 species Near threatened (NT, LR/cd): 534 species Least concern (LC): 2,429 species Data deficient (DD): 1,979 speciesCircle frame.svg
  •   Extinct, since 1500: 310 species
  •   Extinct in the wild (EW): 14 species
  •   Critically endangered (CR): 576 species
  •   Endangered (EN): 503 species
  •   Vulnerable (VU): 871 species
  •   Near threatened (NT, LR/cd): 534 species
  •   Least concern (LC): 2,429 species
  •   Data deficient (DD): 1,979 species
Mollusc species (IUCN, 2015.4)
  • 7216 species have been evaluated
  • 5237 are fully assessed (excludes DD)
  • 2963 are not threatened at present (LC, NT, LR/cd)
  • 1950 are threatened (CR, EN, VU)
  • 324 to 441 are extinct or extinct in the wild (EX, EW, CR(PE), CR(PEW))
Vulnerable (VU) species are considered to be facing a high risk of extinction in the wild.

As of February 2016, the International Union for Conservation of Nature (IUCN) lists 871 vulnerable mollusc species.[1] 12% of all evaluated mollusc species are listed as vulnerable. The IUCN also lists 16 mollusc subspecies as vulnerable.

No subpopulations of molluscs have been evaluated by the IUCN.

For a species to be assessed as vulnerable to extinction, the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild". Endangered and critically endangered species face an even higher risk, and are listed separately even though they also meet the quantitative criteria for vulnerable species: List of endangered molluscs, List of critically endangered molluscs. The three categories combined are referred to as threatened species.

Additionally 1979 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.[2] 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."[3]

This is a complete list of vulnerable mollusc species and subspecies as evaluated by the IUCN. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.

Gastropoda

There are 821 species and 14 subspecies in the class Gastropoda assessed as vulnerable.

Stylommatophora

There are 336 species and four subspecies in the order Stylommatophora assessed as vulnerable. Stylommatophora includes the majority of land snails and slugs.

Charopids

Helicarionids

Orthalicids

Euconulids

Streptaxids

Ferussaciids

Helminthoglyptids

Camaenids

Lauriids

Vertiginids

Trissexodontids

Helicids

Species

Subspecies

Hygromiids

Species

Subspecies

Chondrinids

Enids

  • Mastus amenazada
  • Mastus claudia
  • Napaeus boucheti
  • Napaeus elegans
  • Napaeus esbeltus
  • Napaeus lichenicola
  • Napaeus ornamentatus
  • Napaeus roccellicola
  • Napaeus rupicola
  • Napaeus tagamichensis
  • Napaeus taguluchensis

Other Stylommatophora

Species

Subspecies

Littorinimorpha

There are 323 species and seven subspecies in the order Littorinimorpha assessed as vulnerable.

Hydrobiids

Species

Subspecies

  • Mexipyrgus de carranza snail
  • Mexipyrgus churinceanus churinceanus
  • Mexipyrgus de Escobeda snail
  • Mexipyrgus de Lugo snail
  • Mexipyrgus de west el Mojarral snail
  • Mexipyrgus de East el Mojarral snail
  • Mexithauma de Cienegas snail

Bithyniids

  • Bithynia badiella
  • Bithynia cettinensis
  • Bithynia graeca
  • Bithynia kobialkai
  • Bithynia pseudemmericia
  • Bithynia quintanai
  • Bithynia yildirimii
  • Congodoma zairensis
  • Gabbia pallidula
  • Pseudobithynia ambrakis
  • Pseudobithynia kirka
  • Sierraia expansilabrum
  • Sierraia leonensis

Moitessieriids

  • Moitessieria calloti
  • Moitessieria foui
  • Moitessieria guadelopensis
  • Moitessieria juvenisanguis
  • Moitessieria lludrigaensis
  • Moitessieria massoti
  • Moitessieria mugae
  • Moitessieria nezi
  • Paladilhia jamblussensis
  • Paladilhia roselloi
  • Paladilhia umbilicata
  • Palaospeum bessoni
  • Spiralix gloriae
  • Spiralix pequenoensis

Assimineids

  • Badwater snail
  • Fijianella calciphila
  • Fijianella cornucopia
  • Fijianella laddi
  • Omphalotropis costulata
  • Omphalotropis longula
  • Omphalotropis rosea

Pomatiopsids

  • Hubendickia pellucida
  • Hydrorissoia munensis
  • Jullienia albaobscura
  • Jullienia costata
  • Jullienia flava
  • Jullienia minima
  • Jullienia prasongi
  • Lacunopsis deiecta
  • Lacunopsis globosa
  • Lacunopsis minutarpiettei
  • Lacunopsis munensis
  • Oncomelania nosophora
  • Pachydrobia bertini
  • Pachydrobia levayi
  • Tricula conica
  • Tricula mahadevensis

Other Littorinimorpha species

  • Amnicola cora
  • Stygian amnicola
  • Cremnoconchus conicus
  • Emmericia expansilabris
  • Emmericia ventricosa
  • Modoc pebblesnail
  • Heleobia andecola
  • Heleobia aperta
  • Heleobia aponensis
  • Heleobia galilaea
  • Heleobia ortoni
  • Pseudobenedictia michnoi
  • Stenothyra decollata
  • Stenothyra laotiensis

Sorbeoconcha

There are 55 species in the order Sorbeoconcha assessed as vulnerable.

Pleurocerids

Melanopsids

Thiarids

Pachychilids

  • Brotia annamita
  • Brotia citrina
  • Brotia hoabinhensis
  • Brotia laodelectata
  • Brotia paludiformis
  • Brotia solemiana
  • Brotia subgloriosa
  • Brotia wykoffi
  • Potadoma alutacea
  • Potadoma vogeli

Paludomids

Architaenioglossa

Species

Subspecies

Hygrophila

Species

Subspecies

Neogastropoda

There are 27 species in the order Neogastropoda assessed as vulnerable.

Conids

Other Gastropoda species

Bivalvia

There are 48 species and two subspecies in the class Bivalvia assessed as vulnerable.

Unionoida

There are 36 species and two subspecies in the order Unionoida assessed as vulnerable.

Margaritiferids

Unionids

Species

Subspecies

Hyriids

Iridinids

Species

Subspecies

Arcoida

Veneroida

Cephalopods

See also

References

  1. ↑ "IUCN Red List version 2015.4". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 19 February 2016.
  2. ↑ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
  3. ↑ "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.
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