List of critically endangered invertebrates

Extinct, since 1500: 394 species Extinct in the wild (EW): 16 species Critically endangered (CR): 961 species Endangered (EN): 1,119 species Vulnerable (VU): 2,121 species Near threatened (NT, LR/cd): 1,079 species Least concern (LC): 6,699 species Data deficient (DD): 5,127 speciesCircle frame.svg
  •   Extinct, since 1500: 394 species
  •   Extinct in the wild (EW): 16 species
  •   Critically endangered (CR): 961 species
  •   Endangered (EN): 1,119 species
  •   Vulnerable (VU): 2,121 species
  •   Near threatened (NT, LR/cd): 1,079 species
  •   Least concern (LC): 6,699 species
  •   Data deficient (DD): 5,127 species
Invertebrate species (IUCN, 2015.4)
  • 17,516 species have been evaluated
  • 12,389 are fully assessed (excludes DD)
  • 7778 are not threatened at present (LC, NT, LR/cd)
  • 4201 are threatened (CR, EN, VU)
  • 410 to 609 are extinct or extinct in the wild (EX, EW, CR(PE), CR(PEW))
Critically Endangered (CR) species face an extremely high risk of extinction in the wild.

As of February 2016, the International Union for Conservation of Nature (IUCN) lists 961 critically endangered invertebrate species, including 199 which are tagged as possibly extinct.[1][2] 5.5% of all evaluated invertebrate species 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 5127 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 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."[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. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.

Nemertea species

Annelids

Onychophora

Molluscs

There are 576 mollusc species and 11 mollusc subspecies assessed as critically endangered.

Gastropoda

There are 507 species and six subspecies in the class Gastropoda assessed as critically endangered.

Stylommatophora

There are 232 species and five subspecies in the order Stylommatophora assessed as critically endangered. Stylommatophora includes the majority of land snails and slugs.

Amastrids
Partulids
Achatinellids
Endodontids

Species

Subspecies

Charopids
Orthalicids
Streptaxids
Helicids
Hygromiids
Enids
Other Stylommatophora species

Littorinimorpha

There are 181 species in the order Littorinimorpha assessed as critically endangered.

Hydrobiids
Bithyniids
  • Bithynia kastorias
  • Gabbia alticola
  • Gabbiella candida
  • Gabbiella depressa
  • Gabbiella matadina (possibly extinct)
  • Gabbiella neothaumaeformis
  • Gabbiella parva
  • Incertihydrobia teesdalei
  • Jubaia aethiopica
  • Pseudobithynia euboeensis
  • Pseudobithynia falniowskii
  • Pseudobithynia kathrinae
  • Pseudobithynia panetolis
  • Sierraia outambensis
  • Soapitia dageti (possibly extinct)
Assimineids
  • Kubaryia pilikia (possibly extinct)
  • Omphalotropis ingens (possibly extinct)
  • Pseudogibbula cara (possibly extinct)
  • Pseudogibbula duponti
  • Septariellina congolensis
  • Valvatorbis mauritii (possibly extinct)
Other Littorinimorpha species

Sorbeoconcha

  • Pleurocera ampla
  • Lily Shoals elimia
  • Princess elimia
  • Mossy elimia (possibly extinct)
  • Leptoxis melanoides
  • Plicate rocksnail
  • Melanoides agglutinans (possibly extinct)
  • Melanopsis ammonis
  • Melanopsis brevicula
  • Melanopsis chlorotica
  • Melanopsis germaini (possibly extinct)
  • Melanopsis infracincta (possibly extinct)
  • Melanopsis khabourensis (possibly extinct)
  • Melanopsis pachya (possibly extinct)
  • Melanopsis parreyssii
  • Melanopsis penchinati
  • Melanopsis saharica
  • Corpulent hornsnail
  • Potadoma kadeii
  • Potadoma wansoni
  • Pseudocleopatra dartevellei
  • Tylomelania kruimeli

Architaenioglossa

There are 45 species in the order Architaenioglossa assessed as critically endangered.

Diplommatinids
Other Architaenioglossa species

Cycloneritimorpha

Hygrophila

Species

Subspecies

Other Gastropoda species

Bivalvia

There are 68 species and five subspecies in the class Bivalvia assessed as critically endangered.

Unionoida

There are 65 species and five subspecies in the order Unionoida assessed as critically endangered.

Margaritiferids

Species

Subspecies

Unionids

Species

Subspecies

Hyriids

Veneroida

  • Dreissena caspia (possibly extinct)
  • Eupera crassa
  • Pisidium ethiopicum

Cephalopods

Cnidaria

Arthropods

There are 373 arthropod species and three arthropod subspecies assessed as critically endangered.

Centipedes

  • Ityphilus melanostigmus
  • Mecistocephalus cyclops (possibly extinct)
  • Mecistocephalus sechellarum (possibly extinct)

Seed shrimps

Arachnids

There are 47 arachnid species assessed as critically endangered.

Harvestmen

  • Seychelles blind harvestman
  • Biantes parvulus (possibly extinct)
  • Holozoster ovalis (possibly extinct)
  • Ibalonius lomani (possibly extinct)
  • Mitraceras crassipalpum (possibly extinct)
  • Sitalcicus incertus (possibly extinct)

Spiders

Other arachnid species

  • Afrogarypus seychellesensis (possibly extinct)
  • Silhouette giant mite
  • Seychelles forest scorpion
  • Mahezomus apicoporus
  • Saaristo's giant mite

Branchiopoda

Millipedes

Maxillopoda

Includes barnacles, copepods and a number of related animals.

Malacostracans

There are 125 malacostracan species and one malacostracan subspecies assessed as critically endangered. Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others.

Mysida

Mictaceans

Isopods

Amphipods

Decapods

There are 106 decapod species and one decapod subspecies assessed as critically endangered.

Parastacids
Gecarcinucids
Atyids
  • Atya brachyrhinus (possibly extinct)
  • Caridina apodosis (possibly extinct)
  • Caridina linduensis
  • Caridina subventralis
  • Caridina tumida
  • Caridina yilong (possibly extinct)
  • Edoneus atheatus
  • Lancaris kumariae
  • Paratya norfolkensis
  • Sinodina acutipoda (possibly extinct)
  • Typhlatya iliffei
Cambarids

Species

Subspecies

Palaemonids
  • Cryphiops brasiliensis
  • Cryphiops luscus (possibly extinct)
  • Leptopalaemon glabrus
  • Macrobrachium denticulatum (possibly extinct)
  • Macrobrachium oxyphilus (possibly extinct)
  • Macrobrachium purpureamanus (possibly extinct)
  • Macrobrachium scorteccii (possibly extinct)
  • Florida cave shrimp (possibly extinct)
  • Palaemonetes lindsayi
  • Palaemonetes mesopotamicus
  • Palaemonetes mexicanus
Other decapod species

Insects

There are 176 insect species and two insect subspecies assessed as critically endangered.

Blattodea

  • Balta crassivenosa (possibly extinct)
  • Desroches cockroach
  • Holocompsa pusilla (possibly extinct)
  • Hololeptoblatta pandanicola
  • Sliferia similis (possibly extinct)
  • Theganopteryx grisea (possibly extinct)
  • Theganopteryx liturata (possibly extinct)
  • Theganopteryx scotti (possibly extinct)

Orthoptera

There are 61 species in the order Orthoptera assessed as critically endangered.

Euschmidtiids
  • Morogoro monkey grasshopper (possibly extinct)
  • Mlingano monkey grasshopper (possibly extinct)
  • Burtt's monkey grasshopper (possibly extinct)
  • Dirsh's monkey grasshopper (possibly extinct)
  • Phipps' monkey grasshopper (possibly extinct)
  • Usambara monkey grasshopper
  • Dar-es-salaam monkey grasshopper (possibly extinct)
Acridids
Tettigoniids
Other Orthoptera species

Hymenoptera

Lepidoptera

Moths and butterflies

Beetles

Odonata

Includes dragonflies and damselflies.

Species

Subspecies

Other insect species

See also

References

  1. ↑ "IUCN Red List version 2015.4". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 19 February 2016.
  2. ↑ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2015.4)". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 19 November 2015.
  3. ↑ "Limitations of the Data". The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 11 January 2016.
  4. ↑ "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.
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