List of endangered arthropods facts for kids

Endangered (EN) species are considered to be facing a very high risk of extinction in the wild.

In July 2016, the International Union for Conservation of Nature (IUCN) listed 616 endangered arthropod species. Of all evaluated arthropod, 6.5% species are listed as endangered. The IUCN also lists 27 arthropod subspecies as endangered.

No subpopulations of arthropods have been evaluated by the IUCN.

For a species to be considered endangered by the IUCN it must meet certain quantitative criteria which are designed to classify taxa facing "a very high risk of extinction". An even higher risk is faced by critically endangered species, which meet the quantitative criteria for endangered species. Critically endangered arthropods are listed separately. There are 1010 arthropod species which are endangered or critically endangered.

Additionally 2875 arthropod species (30% 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. While the category of 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".

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

Centipedes

Australobius abbreviatus
Australobius inflatitarsis
Australobius sechellarum
Mecistocephalus megalodon
Seychelles long-legged centipede (Seychellonema gerlachi)

Arachnids

There are 72 arachnid species assessed as endangered.

Harvestmen

Biantes albimanus
Biantes minimus
Gnomulus bedoharvengorum
Ibalonius bimaculatus
Ibalonius inscriptus
Ibalonius karschii
Mitraceras pulchra
Samoa sechellana

Spiders

Kauaʻi cave wolf spider (Adelocosa anops)
Anapistula seychellensis
Argyrodes chionus
Bardala labarda
Baviola luteosignata
Cenemus mikehilli
Cenemus silhouette
Clubiona mahensis
Clubiona nigrimaculosa
Cynapes wrighti
Dipoena hasra
Dipoena pristea
Euryopis helcra
Firmicus insularis
Gamasomorpha mornensis
Parambikulam large burrowing spider (Haploclastus kayi)
Hispo alboclypea
Hispo striolata
Ischnothyreus serpentinum
Larinia dasia
Lionneta mahensis
Lionneta orophila
Lionneta praslinensis
Lionneta savyi
Lionneta sechellensis
Lionneta silhouettei
Lionneta veli
Mariblemma pandani
Microbianor golovatchi
Nanume naneum
Orchestina justini
Orchestina sechellorum
Patri david
Phycosoma menustya
Beautiful parachute spider (Poecilotheria formosa)
Bengal ornamental (Poecilotheria miranda)
Reddish parachute spider (Poecilotheria rufilata)
Prasonica anarillea
Prasonicella marsa
Prida sechellensis
Pseudicius seychellensis
Rhomphaea recurvata
Sadies gibbosa
Sadies trifasciata
Salpesia soricina
Sason sechellanum
Scytodes pholcoides
Seycellesa braueri
Seychellia wiljoi
Stenoonops opisthornatus
Tetrablemma benoiti
Theridion cloxum
Theridion mehlum
Theridion nagorum
Theridion palanum
Tylorida mornensis

Other arachnid species

Anatemnus seychellesensis
Anepsiozomus sobrinus
Apozomus gerlachi
Compsaditha seychellensis
Ideoblothrus seychellesensis
Isometrus deharvengi
Fading beetle mite (Scheloribates evanescens)
Brauer's giant mite (Sternothyrus braueri)

Branchiopoda

Conservancy fairy shrimp (Branchinecta conservatio)
Longhorn fairy shrimp (Branchinecta longiantenna)
San Diego fairy shrimp (Branchinecta sandiegonensis)
Peninsula fairy shrimp (Branchinella alachua)
Lepidurus packardi
Streptocephalus dendrophorus
Streptocephalus dendyi
Streptocephalus guzmani
Riverside fairy shrimp (Streptocephalus woottoni)
Streptocephalus zuluensis

Millipedes

Badplaas black millipede (Doratogonus furculifer)
Strong black millipede (Doratogonus infragilis)
Minor black millipede (Doratogonus minor)
Ruby-legged black millipede (Doratogonus rubipodus)
Northern black millipede (Doratogonus septentrionalis)
Zululand black millipede (Doratogonus zuluensis)
Eucarlia hoffmani
Eucarlia urophora
Gonatotrichus silhouettensis
Pterozonium tropiphorum
Rhinotus densepilosus
Rhinotus vanmoli
Seychelles giant millipede (Sechelleptus seychellarum)
Seychelles pill-millipede (Sechelliosoma forcipatum)
Spiromanes braueri
Spiromanes sechellarum

Malacostracans

Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 170 malacostracan species and six malacostracan subspecies assessed as endangered.