- Extinct in the wild (EW): 15 species
- Critically endangered (CR): 987 species
- Endangered (EN): 1,163 species
- Vulnerable (VU): 2,178 species
- Near threatened (NT, LR/cd): 1,105 species
- Least concern (LC): 6,919 species
- Data deficient (DD): 5,278 species
- 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)]
- ^ excludes data deficient evaluations.
- ^ NT, LR/cd, LC.
- ^ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
- ^ Chart omits extinct (EX) species
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.
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.
- ^ "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.
- ^ "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.
- ^ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
- ^ "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.