List of critically endangered arthropods

As of July 2016, the International Union for Conservation of Nature (IUCN) lists 394 critically endangered arthropod species, including 86 which are tagged as possibly extinct.[1][2] 4.1% of all evaluated arthropod species are listed as critically endangered. The IUCN also lists three arthropod subspecies as critically endangered.

393 critically endangered arthropod species (4.1%)626 endangered arthropod species (6.6%)1081 vulnerable arthropod species (11%)398 near threatened arthropod species (4.2%)4080 least concern arthropod species (43%)2890 data deficient arthropod species (31%)
Arthropod species (IUCN, 2016-2)
  • 9470 extant species have been evaluated
  • 6580 of those are fully assessed[lower-alpha 1]
  • 4478 are not threatened at present[lower-alpha 2]
  • 2100 to 4990 are threatened[lower-alpha 3]
  • 83 to 169 are extinct or extinct in the wild:
    • 81 extinct (EX) species[lower-alpha 4]
    • 2 extinct in the wild (EW)
    • 86 possibly extinct [CR(PE)]
    • 0 possibly extinct in the wild [CR(PEW)]
  1. excludes data deficient evaluations.
  2. NT, LR/cd, LC.
  3. Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
  4. Chart omits extinct (EX) species
Critically Endangered (CR) species face an extremely high risk of extinction in the wild.

No subpopulations of arthropods have been evaluated by the IUCN.

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.[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 arthropod species and subspecies as evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

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 (Benoitinus elegans)
  • 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 (Dicrogonatus niger)
  • Seychelles forest scorpion (Lychas braueri)
  • Mahezomus apicoporus
  • Saaristo's giant mite (Michaelothyrus seychellensis)

Branchiopoda

Millipedes
  • Diglossosternoides curiosus (possibly extinct)
  • Major black millipede (Doratogonus major)
  • Eostemmiulus caecus
  • Eucarlia mauriesi
  • Rhinotus albifrons (possibly extinct)
  • Sechelleptus unilineatus
  • Spirobolellus simplex (possibly extinct)

Entognatha
  • Ceratophysella sp. nov. 'HC' (possibly extinct)
  • Delamarephorura tami (possibly extinct)

Maxillopoda

Includes barnacles, copepods and a number of related animals.

Malacostracans

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

Mysida
  • Bermudamysis speluncola
  • Sterrer's cave mysid (Platyops sterreri)

Mictaceans
  • Mictocaris halope

Isopods

Amphipods

Decapods

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

Parastacids

Gecarcinucids

Atyids

Cambarids

Species

Subspecies

  • Procambarus rogersi expletus

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 (Palaemonetes cummingi) (possibly extinct)
  • Palaemonetes lindsayi
  • Palaemonetes mesopotamicus
  • Palaemonetes mexicanus

Other decapod species
  • Barbouria cubensis
  • Orchid Island crab (Geothelphusa lanyu)
  • Green crab (Geothelphusa lutao)
  • Singapore freshwater crab (Johora singaporensis)
  • Karstama balicum
  • Karstama emdi
  • Grandbassa river crab (Liberonautes grandbassa)
  • Lugbe river crab (Liberonautes lugbe)
  • Placid crayfish (Pacifastacus fortis)
  • Procaris chacei
  • Somersiella sterreri
  • Strengeriana antioquensis (possibly extinct)
  • Tehuana veracruzana (possibly extinct)

Insects
Main article: List of critically endangered insects

There are 195 insect species and two insect subspecies assessed as critically endangered.

Blattodea
  • Balta crassivenosa (possibly extinct)
  • Desroches cockroach (Delosia ornata)
  • 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 72 species in the order Orthoptera assessed as critically endangered.

Euschmidtiids
  • Morogoro monkey grasshopper (Chromomastax movogovodia) (possibly extinct)
  • Mlingano monkey grasshopper (Euschmidtia bidens) (possibly extinct)
  • Burtt's monkey grasshopper (Euschmidtia burtti) (possibly extinct)
  • Dirsh's monkey grasshopper (Euschmidtia dirshi) (possibly extinct)
  • Phipps' monkey grasshopper (Euschmidtia phippsi) (possibly extinct)
  • Usambara monkey grasshopper (Euschmidtia uvarovi)
  • Dar-es-salaam monkey grasshopper (Euschmidtia viridifasciata) (possibly extinct)

Crickets
  • Gryllapterus tomentosus
  • Metioche payendeei
  • Metioche superbus
  • Mahé boulder cricket (Phalangacris alluaudi)
  • Seychellesia nitidula

Acridids
  • Zanzibar giant forest grasshopper (Allaga ambigua) (possibly extinct)
  • Usambara splendid grasshopper (Anischnansis burtti) (possibly extinct)
  • Uluguru forest grasshopper (Burttia sylvatica)
  • Adana grasshopper (Chorthippus antecessor)
  • Bozdagh grasshopper (Chorthippus bozdaghi)
  • Ilgaz mountain grasshopper (Chorthippus ilkazi)
  • Epirus dancing grasshopper (Chorthippus lacustris)
  • Uluguru Mountain Grasshopper (Cyphocerastis uluguruensis)
  • Maspalomas bow-legged grasshopper (Dericorys minutus) (possibly extinct)
  • Kilosa noble grasshopper (Eupropacris abbreviata) (possibly extinct)
  • Gastrimargus immaculatus
  • Myrmeleotettix ethicus
  • Triandafilia mountain grasshopper (Oropodisma lagrecai)
  • Willemse's mountain grasshopper (Oropodisma willemsei)
  • East Usambara speckled grasshopper (Physocrobylus tessa)
  • Schayera baiulus

Tettigoniids
  • Mount Coke false shieldback (Acilacris furcatus)
  • Kristin's false shieldback (Acilacris kristinae)
  • Santa Monica shieldback katydid (Aglaothorax longipennis)
  • Black-spotted false shieldback (Aroegas nigroornatus)
  • Pondo flat-necked shieldback (Arytropteris pondo)
  • Fer's marbled bush-cricket (Eupholidoptera feri)
  • Gran Canaria bush-cricket (Evergoderes cabrerai) (possibly extinct)
  • Hemisaga elongata
  • Middlekauf's shieldback katydid (Idiostatus middlekaufi)
  • Ixalodectes flectocercus
  • Nanodectes bulbicercus
  • Pachysaga strobila
  • Imperiled grass false shieldback (Paracilacris periclitatus)
  • Paradecolya briseferi
  • Giona Greek bush-cricket (Parnassiana gionica)
  • Menalon Greek bush-cricket (Parnassiana menalon)
  • Akarnanika Greek bush-cricket (Parnassiana nigromarginata)
  • Panaitoliko Greek bush-cricket (Parnassiana panaetolikon)
  • Parnassos Greek bush-cricket (Parnassiana parnassica)
  • Zulu ambush katydid (Peringueyella zulu) (possibly extinct)
  • Cyprian grey bush-cricket (Platycleis kibris)
  • Calbali bush-cricket (Psorodonotus ebneri)
  • Three-lobed bush-cricket (Rhacocleis trilobata) (possibly extinct)
  • Rodriguesiophisis spinifera
  • Sardinian grey bush-cricket (Sardoplatycleis galvagnii)
  • Arboreal seedpod shieldback (Thoracistus arboreus)
  • Peringuey's seedpod shieldback (Thoracistus peringueyi) (possibly extinct)
  • Transkei shieldback (Transkeidectes multidentis)

Other Orthoptera species
  • Morogoro pretty grasshopper (Acanthothericles bicoloripes) (possibly extinct)
  • Palma stick grasshopper (Acrostira euphorbiae)
  • Tenerife stick grasshopper (Acrostira tenerifae)
  • Arachnocephalus medvedevi
  • Castleton's flightless katydid (Austrodontura castletoni)
  • Cave katydid (Cedarbergeniana imperfecta)
  • Mpwapwa silent grasshopper (Chromousambilla burtti) (possibly extinct)
  • Seychelles crested groundhopper (Coptottigia cristata)
  • Duplessis' agile katydid (Griffiniana duplessisae)
  • Crau plain grasshopper (Prionotropis rhodanica)
  • Seychelles shortwinged groundhopper (Procytettix fusiformis) (possibly extinct)
  • Marais' lace-winged katydid (Pseudosaga maraisi)
  • Pyrgacris descampsi
  • Pyrgacris relictus
  • Torreya pygmy grasshopper (Tettigidea empedonepia)
  • San Torini cave-cricket (Troglophilus marinae)

Hymenoptera

Lepidoptera

Moths and butterflies

Beetles

Odonata

Includes dragonflies and damselflies.

Species

Subspecies

  • Chlorogomphus brunneus keramensis
  • Delphi cordulegaster (Cordulegaster helladica kastalia)

Other insect species
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See also

References
  1. "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.
  2. "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.
  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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