In July 2016, the International Union for Conservation of Nature (IUCN) listed 1163 endangered invertebrate species. 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.
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 invertebrates are listed separately. There are 2150 invertebrate species which are endangered or critically endangered.
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. 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 invertebrate species and subspecies as evaluated by the IUCN.
Molluscs There are 507 mollusc species and nine mollusc subspecies assessed as endangered.
Gastropods There are 448 gastropod species and seven gastropod subspecies assessed as endangered.
Stylommatophora Stylommatophora includes the majority of land snails and slugs. There are 187 species and two subspecies in the order Stylommatophora assessed as endangered.
Partulids
Achatinellids
Cerastids
Endodontids
Charopids
Helicarionids
Orthalicids
Species
Subspecies Stock Island tree snail (Orthalicus reses reses)
Euconulids
Streptaxids
Species
Subspecies Tayloria urguessensis subangulata
Camaenids
Helicids
Hygromiids
Other Stylommatophora species
Littorinimorpha There are 147 species and three subspecies in the order Littorinimorpha assessed as endangered. Hydrobiids
Bithyniids
Species
Subspecies
Assimineids
Pomatiopsids
Other Littorinimorpha species
Sorbeoconcha
Architaenioglossa
Species
Subspecies Bellamya unicolor abyssinicus Maizania hildebrandti thikensis
Cycloneritimorpha
Hygrophila species There are 22 Hygrophila species assessed as endangered.
Planorbids
Lymnaeids
Neogastropoda
Other gastropod species
Bivalvia There are 57 species and two subspecies in the class Bivalvia assessed as endangered.
Unionida There are 54 species and two subspecies in the order Unionoida assessed as endangered.
Margaritiferids
Unionids Species
Subspecies Catspaw (Epioblasma obliquata obliquata) Rough rabbitsfoot (Quadrula cylindrica strigillata)
Other Unionida species
Venerida
Cephalopods Cirroctopus hochbergi Opisthoteuthis mero
Cnidaria There are 28 species in the phylum Cnidaria assessed as endangered. Hydrozoa Sea ginger (Millepora alcicornis) Millepora exaesa Net fire coral (Millepora dichotoma) Millepora intricata Blade fire coral (Millepora platyphylla) Millepora tenera
Anthozoa There are 26 species in the class Anthozoa assessed as endangered. Sea pens Crassophyllum thessalonicae
Actiniaria Greek anemone (Paranemonia vouliagmensis)
Scleractinia
Arthropods There are 616 arthropod species and 27 arthropod subspecies assessed as endangered.
Xhiphosura Tri-spine horseshoe crab (Tachypleus tridentatus)
Centipedes
Arachnids There are 72 arachnid species assessed as endangered.
Harvestmen
Spiders
Other arachnid species
Branchiopoda
Millipedes
Malacostracans Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 170 malacostracan species and six malacostracan subspecies assessed as endangered.
Isopods
Species
Subspecies
Amphipods
Species
Subspecies Niphargus elegans zagrebensis
Decapods There are 154 decapod species and two decapod subspecies assessed as endangered.
Parastacids
Gecarcinucids
Atyids
Cambarids Species
Subspecies Withlocoochee light-fleeing cave crayfish (Procambarus lucifugus lucifugus)
Potamonautids
Potamids
Palaemonids Species
Subspecies Macrobrachium lamarrei lamarroides
Other decapod species
Insects There are 343 insect species and 21 insect subspecies assessed as endangered.
Blattodea
Orthoptera There are 91 species and two subspecies in the order Orthoptera assessed as endangered.
Lentulids
Tetrigids
Euschmidtiids
Mogoplistids
Pamphagids
Crickets Species
Subspecies Phaloria insularis insularis
Acridids
Tettigoniids
Phaneropterids Species
Subspecies Isophya longicaudata longicaudata
Hymenoptera
Lepidoptera Lepidoptera comprises moths and butterflies. There are 51 species in the order Lepidoptera assessed as endangered.
Swallowtail butterflies
Lycaenids
Nymphalids
Other Lepidoptera species
Beetles There are 72 beetle species assessed as endangered.
Dytiscids
Stag beetles
Geotrupids
Longhorn beetles
Scarabaeids
Other beetle species
Odonata Odonata includes dragonflies and damselflies. There are 97 species and 19 subspecies in the order Odonata assessed as endangered.
Platystictids
Platycnemidids Species
Subspecies
Megapodagrionids
Gomphids Species
Subspecies
Calopterygids Species
Subspecies Matrona basilaris japonica
Coenagrionids Species
Subspecies Pseudagrion torridum hulae
Aeshnids Species
Subspecies
Libellulids Species
Subspecies
Other Odonata Species
Subspecies
Other insect species
Echinoderms
Other invertebrate species
See also Lists of IUCN Red List endangered species List of least concern invertebrates List of near threatened invertebrates List of vulnerable invertebrates List of critically endangered invertebrates List of recently extinct invertebrates List of data deficient invertebrates
References