List of near threatened molluscs

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14 extinct in the wild mollusc species (0.20%)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%)
Mollusc species (IUCN, 2020.1)
  • 6941 extant species have been evaluated
  • 4953 of those are fully assessed[a]
  • 2972 are not threatened at present[b]
  • 1967 to 3955 are threatened[c]
  • 324 to 441 are extinct or extinct in the wild:
    • 311 extinct (EX) species[d]
    • 13 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
Near threatened (NT) species do not currently qualify for critically endangered (CR), endangered (EN) or vulnerable (VU) status, but are likely to qualify for a threatened category in the near future, or are already close to qualifying.

In September 2016, the International Union for Conservation of Nature (IUCN) listed 535 near threatened mollusc species.[1] Of all evaluated mollusc species, 7.4% are listed as near threatened. The IUCN also lists nine mollusc subspecies as near threatened.

No subpopulations of molluscs have been evaluated by the IUCN.

This is a complete list of near threatened mollusc species and subspecies evaluated by the IUCN.

Gastropods[edit]

There are 477 species and four subspecies of gastropod assessed as near threatened.

Stylommatophora[edit]

Stylommatophora includes the majority of land snails and slugs. There are 250 species and four subspecies in the order Stylommatophora assessed as near threatened.

Zonitids[edit]

Clausiliids[edit]

Species

Subspecies

Helminthoglyptids[edit]

Camaenids[edit]

Species

Subspecies

Vertiginids[edit]

Cochlicellids[edit]

Trissexodontids[edit]

Helicids[edit]

Hygromiids[edit]

Species

Subspecies

Vitrinids[edit]

Chondrinids[edit]

Enids[edit]

Argnids[edit]

Other Stylommatophora species[edit]

Littorinimorpha[edit]

There are 115 species in the order Littorinimorpha assessed as near threatened.

Hydrobiids[edit]

Bithyniids[edit]

Moitessieriids[edit]

Assimineids[edit]

Pomatiopsids[edit]

Stenothyrids[edit]

Sorbeoconcha[edit]

Architaenioglossa[edit]

There are 41 species in the order Architaenioglossa assessed as near threatened.

Pupinids[edit]

Diplommatinids[edit]

Aciculids[edit]

Viviparids[edit]

Ampullariids[edit]

Craspedopomatids[edit]

Lower Heterobranchia species[edit]

Cycloneritimorpha[edit]

Hygrophila species[edit]

Neogastropoda[edit]

There are 29 species in the order Neogastropoda assessed as near threatened.

Buccinids[edit]

Muricids[edit]

Conids[edit]

Bivalvia[edit]

There are 57 species and five subspecies in the class Bivalvia assessed as near threatened.

Unionida[edit]

There are 49 species and five subspecies in the order Unionoida assessed as near threatened.

Unionids[edit]

Species

Subspecies

Hyriids[edit]

Cardiida[edit]

Venerida[edit]

Cephalopods[edit]

See also[edit]

References[edit]

  1. ^ "IUCN Red List version 2016-2". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources. Retrieved 8 September 2016.


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