List of vulnerable molluscs

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%)Circle frame.svg
  •   Extinct in the wild (EW): 14 species
  •   Critically endangered (CR): 581 species
  •   Endangered (EN): 507 species
  •   Vulnerable (VU): 879 species
  •   Near threatened (NT, LR/cd): 535 species
  •   Least concern (LC): 2,437 species
  •   Data deficient (DD): 1,988 species
Mollusc species (IUCN, 2016.1)
  • 6941 extant species have been evaluated
  • 4953 of those are fully assessed[lower-alpha 1]
  • 2972 are not threatened at present[lower-alpha 2]
  • 1967 to 3955 are threatened[lower-alpha 3]
  • 324 to 441 are extinct or extinct in the wild:
    • 310 extinct (EX) species[lower-alpha 4]
    • 14 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
Vulnerable (VU) species are considered to be facing a high risk of extinction in the wild.

As of September 2016, the International Union for Conservation of Nature (IUCN) lists 879 vulnerable mollusc species.[1] 12% of all evaluated mollusc species are listed as vulnerable. The IUCN also lists 18 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 also meet the quantitative criteria of vulnerable species, and are listed separately. See: List of endangered molluscs, List of critically endangered molluscs. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species 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.[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 evaluated by the IUCN.

Gastropods

There are 828 species and 16 subspecies of gastropod assessed as vulnerable.

Stylommatophora

Stylommatophora includes the majority of land snails and slugs. There are 339 species and six subspecies in the order Stylommatophora assessed as vulnerable.

Charopids

Helicarionids

Orthalicids

Euconulids

Streptaxids

Ferussaciids

Helminthoglyptids

Oxychilids

Camaenids

Lauriids

Vertiginids

Species

Subspecies

Trissexodontids

Helicids

Species

Subspecies

Hygromiids

Species

Subspecies

Vitrinids

  • Oligolimax musignani
  • Phenacolimax blanci
  • Plutonia albopalliata
  • Plutonia dianae
  • Sardovitrina polloneriana

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 324 species and seven subspecies in the order Littorinimorpha assessed as vulnerable.

Hydrobiids

Species

Subspecies

  • Mexipyrgus de carranza snail (Mexipyrgus churinceanus carranzae)
  • Mexipyrgus churinceanus churinceanus
  • Mexipyrgus de Escobeda snail (Mexipyrgus churinceanus escobedae)
  • Mexipyrgus de Lugo snail (Mexipyrgus churinceanus lugoi)
  • Mexipyrgus de west el Mojarral snail (Mexipyrgus churinceanus mojarralis)
  • Mexipyrgus de East el Mojarral snail (Mexipyrgus churinceanus multilineatus)
  • Mexithauma de Cienegas snail (Mexipyrgus churinceanus quadripaludium)

Cochliopids

  • Heleobia andecola
  • Heleobia aperta
  • Heleobia aponensis
  • Heleobia galilaea
  • Heleobia ortoni

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

  • Acmella sp. 'Ba Tai'
  • Badwater snail (Assiminea infirma)
  • 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

Amnicolids

  • Amnicola cora
  • Stygian amnicola (Amnicola stygius)
  • Emmericia expansilabris
  • Emmericia ventricosa

Other Littorinimorpha species

  • Cremnoconchus conicus
  • Modoc pebblesnail (Fluminicola modoci)
  • 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

Lower Heterobranchia species

Cycloneritimorpha

Hygrophila

Species

Subspecies

Neogastropoda

Conids

Eupulmonata

Bivalvia

There are 49 species and two subspecies in the class Bivalvia assessed as vulnerable.

Unionoida

There are 37 species and two subspecies in the order Unionoida assessed as vulnerable.

Margaritiferids

Unionids

Species

Subspecies

Hyriids

Iridinids

Species

Subspecies

Mycetopodids

Cardiida

Arcoida

Veneroida

  • Congeria kusceri
  • Dreissena blanci
  • Pisidium artifex
  • Pisidium centrale
  • Pisidium sanguinichristi
  • Montane peaclam (Pisidium ultramontanum)
  • River orb mussel (Sphaerium rivicola)

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. ↑ "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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