List of least concern molluscs

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

In September 2016, the International Union for Conservation of Nature (IUCN) listed 2437 least concern mollusc species.[1] Of all evaluated mollusc species, 34% are listed as least concern. The IUCN also lists five mollusc subspecies as least concern.

No subpopulations of molluscs have been evaluated by the IUCN.

This is a complete list of least concern mollusc species and subspecies evaluated by the IUCN.

Gastropods[edit]

There are 1944 species and three subspecies of gastropod assessed as least concern.

Stylommatophora[edit]

Stylommatophora includes the majority of land snails and slugs. There are 599 species and one subspecies in the order Stylommatophora assessed as least concern.

Charopids[edit]

Streptaxids[edit]

Lauriids[edit]

Vertiginids[edit]

Cochlicellids[edit]

Trissexodontids[edit]

Helicids[edit]

Species

Subspecies

Hygromiids[edit]

Vitrinids[edit]

Chondrinids[edit]

Enids[edit]

Argnids[edit]

Helicodontids[edit]

Orculids[edit]

Other Stylommatophora species[edit]

Littorinimorpha[edit]

There are 311 species and one subspecies in the order Littorinimorpha assessed as least concern.

Hydrobiids[edit]

Cochliopids[edit]

Bithyniids[edit]

Species

Subspecies

Moitessieriids[edit]

Assimineids[edit]

Pomatiopsids[edit]

Amnicolids[edit]

Stenothyrids[edit]

Iravadiids[edit]

Other Littorinimorpha species[edit]

Sorbeoconcha[edit]

There are 132 species and one subspecies in the order Sorbeoconcha assessed as least concern.

Pleurocerids[edit]

Melanopsids[edit]

Semisulcospirids[edit]

Thiarids[edit]

Pachychilids[edit]

Paludomids[edit]

Species

Subspecies

Potamidids[edit]

Architaenioglossa[edit]

There are 158 species in the order Architaenioglossa assessed as least concern.

Cyclophorids[edit]

Pupinids[edit]

Diplommatinids[edit]

Aciculids[edit]

Viviparids[edit]

Ampullariids[edit]

Craspedopomatids[edit]

Lower Heterobranchia species[edit]

Cycloneritimorpha[edit]

There are 40 species in the order Cycloneritimorpha assessed as least concern.

Helicinids[edit]

Neritids[edit]

Neritiliids[edit]

Hygrophila species[edit]

There are 188 Hygrophila species assessed as least concern.

Physids[edit]

Acroloxids[edit]

Planorbids[edit]

Lymnaeids[edit]

Chilinids[edit]

Latiids[edit]

Neogastropoda[edit]

Conids[edit]

Eupulmonata[edit]

Other gastropod species[edit]

Bivalvia[edit]

There are 296 species and two subspecies in the class Bivalvia assessed as least concern.

Unionida[edit]

There are 193 species and one subspecies in the order Unionoida assessed as least concern.

Etheriids[edit]

Unionids[edit]

Hyriids[edit]

Iridinids[edit]

Species

Subspecies

Mycetopodids[edit]

Cardiida[edit]

Arcida[edit]

Venerida[edit]

There are 96 species and one subspecies in the order Veneroida assessed as least concern.

Dreissenids[edit]

Sphaeriids[edit]

Cyrenids[edit]

Species

Subspecies

Donacids[edit]

Other Venerida species[edit]

Mytilida[edit]

Cephalopods[edit]

There are 197 cephalopod species assessed as least concern.

Octopuses[edit]

Sepioloida[edit]

There are 45 species in Sepioloida assessed as least concern.

Sepiids[edit]

Sepiolids[edit]

Sepiadariids[edit]

Oegopsina species[edit]

There are 126 Oegopsina species assessed as least concern.

Enoploteuthids[edit]

Hooked squids[edit]

Chiroteuthids[edit]

Cranchiids[edit]

Gonatids[edit]

Ommastrephids[edit]

Histioteuthids[edit]

Pyroteuthids[edit]

Other Oegopsina species[edit]

Bathyteuthida[edit]

Spirulida[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 (IUCN). Retrieved 8 September 2016.


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