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The IUCN estimates that 66,178 extant vertebrate species have been described, [11] which means that over 95% of the described animal species in the world are invertebrates. Characteristics The trait that is common to all invertebrates is the absence of a vertebral column (backbone): this creates a distinction between invertebrates and vertebrates.
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 ...
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 ...
List of marine aquarium invertebrate species; List of sponges of Venezuela; N. List of near threatened invertebrates; R. List of recently extinct invertebrates; T.
In contrast, a large majority of the insect species of the tropics and the southern hemisphere are probably undescribed. [11] Some 30–40,000 species inhabit freshwater; very few insects, perhaps a hundred species, are marine. [12] Insects such as snow scorpionflies flourish in cold habitats including the Arctic and at high altitude. [13]
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.
Insects (from Latin insectum) are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum . Insects have a chitinous exoskeleton , a three-part body ( head , thorax and abdomen ), three pairs of jointed legs , compound eyes , and a pair of antennae .
See: List of endangered invertebrates, List of critically endangered invertebrates. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species by the IUCN. Additionally 5278 invertebrate species (29% of those evaluated) are listed as data deficient, meaning there is insufficient information for a ...