Wikipedia

List of critically endangered invertebrates

As of July 2016, the International Union for Conservation of Nature (IUCN) listed 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct.[1][2] Of all evaluated invertebrate species, 5.5% are listed as critically endangered. The IUCN also lists 14 invertebrate subspecies as critically endangered.

16 extinct in the wild invertebrate species (0.09%)987 critically endangered invertebrate species (5.6%)1163 endangered invertebrate species (6.6%)2178 vulnerable invertebrate species (12%)1105 near threatened invertebrate species (6.3%)6919 least concern invertebrate species (39%)5278 data deficient invertebrate species (30%)
Invertebrate species (IUCN, 2020.1)
  • 17,646 extant species have been evaluated
  • 12,368 of those are fully assessed[a]
  • 8024 are not threatened at present[b]
  • 4328 to 9606 are threatened[c]
  • 410 to 616 are extinct or extinct in the wild:
    • 395 extinct (EX) species[d]
    • 15 extinct in the wild (EW)
    • 206 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
Critically endangered (CR) species face an extremely high risk of extinction in the wild.

No subpopulations of invertebrates have been evaluated by the IUCN.

Additionally 5278 invertebrate species (29% 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.[3] While the category 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".[4]

This is a complete list of critically endangered invertebrate species and subspecies as evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

Nemertea species edit

Annelids edit

Onychophora edit

Molluscs edit

 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
Main article: List of critically endangered molluscs

There are 581 mollusc species and 11 mollusc subspecies assessed as critically endangered.

Gastropods edit

There are 511 gastropod species and six gastropod subspecies assessed as critically endangered.

Stylommatophora edit

Stylommatophora includes the majority of land snails and slugs. There are 233 species and five subspecies in the order Stylommatophora assessed as critically endangered.

Amastrids edit
Partulids edit
Achatinellids edit
Endodontids edit

Species

Subspecies

Charopids edit
Helicarionids edit
Orthalicids edit
Rhytidids edit
Streptaxids edit
Lauriids edit
Helicids edit
Hygromiids edit
Enids edit
Other Stylommatophora species edit

Littorinimorpha edit

There are 181 species in the order Littorinimorpha assessed as critically endangered.

Hydrobiids edit
Cochliopids edit
Bithyniids edit
Moitessieriids edit
Assimineids edit
Pomatiopsids edit

Sorbeoconcha edit

Architaenioglossa edit

There are 48 species in the order Architaenioglossa assessed as critically endangered.

Cyclophorids edit
Diplommatinids edit
Viviparids edit
Other Architaenioglossa species edit

Cycloneritimorpha edit

Hygrophila edit

Species

Subspecies

Neogastropoda edit

Other gastropod species edit

Bivalvia edit

There are 69 species and five subspecies in the class Bivalvia assessed as critically endangered.

Unionida edit

There are 66 species and five subspecies in the order Unionoida assessed as critically endangered.

Margaritiferids edit

Species

Subspecies

Etheriids edit
Unionids edit

Species

Subspecies

Hyriids edit

Venerida edit

Cephalopods edit

Cnidaria edit

Arthropods edit

 2 extinct in the wild arthropod species (0.02%)393 critically endangered arthropod species (4.1%)626 endangered arthropod species (6.6%)1081 vulnerable arthropod species (11%)398 near threatened arthropod species (4.2%)4080 least concern arthropod species (43%)2890 data deficient arthropod species (31%)
Arthropod species (IUCN, 2016-2)
  • 9470 extant species have been evaluated
  • 6580 of those are fully assessed[a]
  • 4478 are not threatened at present[b]
  • 2100 to 4990 are threatened[c]
  • 83 to 169 are extinct or extinct in the wild:
    • 81 extinct (EX) species[d]
    • 2 extinct in the wild (EW)
    • 86 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
Main article: List of critically endangered arthropods

There are 394 arthropod species and three arthropod subspecies assessed as critically endangered.

Centipedes edit

Seed shrimps edit

Arachnids edit

There are 47 arachnid species assessed as critically endangered.

Harvestmen edit

Spiders edit

Other arachnid species edit

Branchiopoda edit

Millipedes edit

Entognatha edit

Maxillopoda edit

Includes barnacles, copepods and a number of related animals.

Malacostracans edit

Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 125 malacostracan species and one malacostracan subspecies assessed as critically endangered.

Mysida edit

Mictaceans edit

Isopods edit

Amphipods edit

Decapods edit

There are 106 decapod species and one decapod subspecies assessed as critically endangered.

Parastacids edit
Gecarcinucids edit
Atyids edit
Cambarids edit

Species

Subspecies

Palaemonids edit
Other decapod species edit

Insects edit

 1 extinct in the wild insect species (0.02%)195 critically endangered insect species (3.3%)343 endangered insect species (5.7%)608 vulnerable insect species (10%)301 near threatened insect species (5.0%)2843 least concern insect species (47%)1702 data deficient insect species (28%)
Insect species (IUCN, 2016.1)
  • 5993 extant species have been evaluated
  • 4291 of those are fully assessed[a]
  • 3144 are not threatened at present[b]
  • 1146 to 2848 are threatened[c]
  • 59 to 105 are extinct or extinct in the wild:
    • 58 extinct (EX) species[d]
    • 1 extinct in the wild (EW)
    • 46 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
Main article: List of critically endangered insects

There are 195 insect species and two insect subspecies assessed as critically endangered.

Blattodea edit

Orthoptera edit

There are 72 species in the order Orthoptera assessed as critically endangered.

Euschmidtiids edit
Crickets edit
Acridids edit
Tettigoniids edit
Other Orthoptera species edit

Hymenoptera edit

Lepidoptera edit

Moths and butterflies

Beetles edit

Odonata edit

Includes dragonflies and damselflies.

Species

Subspecies

Other insect species edit

See also edit

References edit

  1. ^ "IUCN Red List version 2016.1". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 4 July 2016.
  2. ^ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2016-1)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 4 July 2016.
  3. ^ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
  4. ^ "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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