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List of endangered arthropods

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In July 2016, the International Union for Conservation of Nature (IUCN) listed 616 endangered arthropod species.[1] Of all evaluated arthropod, 6.5% species are listed as endangered. The IUCN also lists 27 arthropod subspecies as endangered.

2 extinct in the wild arthropod species (0.01%)850 critically endangered arthropod species (4.6%)1531 endangered arthropod species (8.3%)1574 vulnerable arthropod species (8.5%)1118 near threatened arthropod species (6.0%)8632 least concern arthropod species (46.8%)4643 data deficient arthropod species (25.2%)
Arthropod species (IUCN, 2025-2)
  • 18431 extant species have been evaluated
  • 13788 of those are fully assessed[a]
  • 9750 are not threatened at present[b]
  • 4223 to 8866 are threatened[c]
  • 83 to 261 are extinct or extinct in the wild:
    • 81 extinct (EX) species[d]
    • 2 extinct in the wild (EW)
    • 171 possibly extinct [CR(PE)]
    • 1 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
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild.

No subpopulations of arthropods have been evaluated by the IUCN.

For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of extinction". An even higher risk is faced by critically endangered species, which meet the quantitative criteria for endangered species. Critically endangered arthropods are listed separately. There are 1010 arthropod species which are endangered or critically endangered.

Additionally 2875 arthropod species (30% 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 endangered arthropod species and subspecies as evaluated by the IUCN.

Centipedes

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Arachnids

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There are 72 arachnid species assessed as endangered.

Harvestmen

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Spiders

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Other arachnid species

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Branchiopoda

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Millipedes

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Malacostracans

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Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 170 malacostracan species and six malacostracan subspecies assessed as endangered.

Isopods

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Amphipods

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Species

Subspecies

Decapods

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There are 154 decapod species and two decapod subspecies assessed as endangered.

Parastacids

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Gecarcinucids

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Atyids

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Cambarids

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Species

Subspecies

Potamonautids

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Potamids

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Palaemonids

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Other decapod species

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Insects

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There are 343 insect species and 21 insect subspecies assessed as endangered.

Blattodea

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Orthoptera

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There are 91 species and two subspecies in the order Orthoptera assessed as endangered.

Lentulids

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Tetrigids

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Euschmidtiids

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Mogoplistids

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Pamphagids

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Crickets

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Acridids

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Tettigoniids

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Phaneropterids

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Species

Subspecies

Hymenoptera

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Lepidoptera

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Lepidoptera comprises moths and butterflies. There are 51 species in the order Lepidoptera assessed as endangered.

Swallowtail butterflies

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Lycaenids

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Nymphalids

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Other Lepidoptera species

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Beetles

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There are 72 beetle species assessed as endangered.

Dytiscids

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Stag beetles

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Geotrupids

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Longhorn beetles

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Scarabaeids

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Other beetle species

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Odonata

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Odonata includes dragonflies and damselflies. There are 97 species and 19 subspecies in the order Odonata assessed as endangered.

Platystictids

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Platycnemidids

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Megapodagrionids

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Gomphids

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Species

Subspecies

Calopterygids

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Species

Subspecies

Coenagrionids

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Aeshnids

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Libellulids

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Other Odonata

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Other insect species

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See also

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References

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  1. ↑ "IUCN Red List version 2016.1". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Archived from the original on 27 June 2014. Retrieved 4 July 2016.
  2. ↑ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Archived from the original on 7 October 2018. 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). Archived from the original on 8 October 2008. Retrieved 11 January 2016.
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