•   Extinct in the wild (EW): 2 species
•   Critically endangered (CR): 393 species
•   Endangered (EN): 626 species
•   Vulnerable (VU): 1,081 species
•   Near threatened (NT, LR/cd): 398 species
•   Least concern (LC): 4,080 species
•   Data deficient (DD): 2,890 species

Arthropod species (IUCN, 2016-2)

• 9470 extant species have been evaluated
• 6580 of those are fully assessed^{[lower-alpha 1]}
• 4478 are not threatened at present^{[lower-alpha 2]}
• 2100 to 4990 are threatened^{[lower-alpha 3]}
• 83 to 169 are extinct or extinct in the wild:
  • 81 extinct (EX) species^{[lower-alpha 4]}
  • 2 extinct in the wild (EW)
  • 86 possibly extinct [CR(PE)]
  • 0 possibly extinct in the wild [CR(PEW)]

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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

As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2875 data deficient arthropod species.^[1] 30% of all evaluated arthropod species are listed as data deficient. The IUCN also lists 17 arthropod subspecies as data deficient.

No subpopulations of arthropods have been evaluated by the IUCN.

This is a complete list of data deficient arthropod species and subspecies as evaluated by the IUCN.

Arachnids

Branchiopoda

• Streptocephalus kargesi

Millipedes

Maxillopoda

Maxillopoda includes barnacles, copepods and a number of related animals. There are 22 species in the class Maxillopoda assessed as data deficient.

Xiphosura

Malacostracans

Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 1130 malacostracan species and 17 malacostracan subspecies assessed as data deficient.

Insects

There are 1702 insect species assessed as data deficient.

See also

• Lists of IUCN Red List data deficient species
• List of least concern arthropods
• List of near threatened arthropods
• List of vulnerable arthropods
• List of endangered arthropods
• List of critically endangered arthropods
• List of recently extinct arthropods

References