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Of all evaluated invertebrate species, 6.1% are listed as near threatened. The IUCN also lists 15 invertebrate subspecies as near threatened. No subpopulations of invertebrates have been evaluated by the IUCN. This is a complete list of near threatened invertebrate species and subspecies as evaluated by the IUCN.
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.
In July 2016, the International Union for Conservation of Nature (IUCN) listed 1163 endangered invertebrate species. [1] Of all evaluated invertebrate species, 6.4% were listed as endangered. The IUCN also lists 36 invertebrate subspecies as endangered. No subpopulations of invertebrates have been evaluated by the IUCN.
Invertebrates cells fire in response to similar stimuli as mammals, such as tissue trauma, high temperature, or changes in pH. The first invertebrate in which a neuron cell was identified was the medicinal leech, Hirudo medicinalis. [14] [15] Learning and memory using nociceptors have been described in the sea hare, Aplysia.
Of more than a thousand known species of scorpion, only a few dozen have venom that is dangerous to humans, [6] most notably the bark scorpions, including: Centruroides spp. Deathstalker (Leiurus quinquestriatus) Central and South American Tityus, include the Brazilian yellow scorpion. Androctonus spp. Parabuthus spp. Hottentotta spp.
The IUCN also lists 47 invertebrate subspecies as vulnerable. No subpopulations of invertebrates have been evaluated by the IUCN. For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild".
Invertebrates spread bacterial, viral and protozoan pathogens by two main mechanisms. Either via their bite, as in the case of malaria spread by mosquitoes, or via their faeces, as in the case of Chagas' Disease spread by Triatoma bugs or epidemic typhus spread by human body lice. Many invertebrates are responsible for transmitting diseases.
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 ...