List of data deficient arthropods
- Extinct in the wild (EW): 2 species
- Critically endangered (CR): 850 species
- Endangered (EN): 1,531 species
- Vulnerable (VU): 1,574 species
- Near threatened (NT, LR/cd): 1,118 species
- Least concern (LC): 8,632 species
- Data deficient (DD): 4,643 species
Arthropod species (IUCN, 2025-2)
- 18431 extant species have been evaluated
- 13788 of those are fully assessed
- 9750 are not threatened at present
- 4223 to 8866 are threatened
- 83 to 261 are extinct or extinct in the wild:
- 81 extinct (EX) species
- 2 extinct in the wild (EW)
- 171 possibly extinct [CR(PE)]
- 1 possibly extinct in the wild [CR(PEW)]
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2875 data deficient arthropod species. 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.