List of endangered invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 1163 endangered invertebrate species. 6.4% of all evaluated invertebrate species are 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 exintction". 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. Orthalicids. Species Subspecies Streptaxids. Species Subspecies Littorinimorpha. There are 147 species and three subspecies in the order Littorinimorpha assessed as endangered. Bithyniids. Species Subspecies Architaenioglossa. Species Subspecies Hygrophila species . There are 22 Hygrophila species assessed as endangered. 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. Unionids. Species Subspecies Cnidaria. There are 28 species in the phylum Cnidaria assessed as endangered. Anthozoa. There are 26 species in the class Anthozoa assessed as endangered. Arthropods. There are 616 arthropod species and 27 arthropod subspecies assessed as endangered. Arachnids. There are 72 arachnid species assessed as endangered. 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 Decapods. There are 154 decapod species and two decapod subspecies assessed as endangered. Cambarids. Species Subspecies Palaemonids. Species Subspecies Insects. There are 343 insect species and 21 insect subspecies assessed as endangered. Orthoptera. There are 91 species and two subspecies in the order Orthoptera assessed as endangered. Crickets. Species Subspecies Phaneropterids. Species Subspecies Lepidoptera. Lepidoptera comprises moths and butterflies. There are 51 species in the order Lepidoptera assessed as endangered. Beetles. There are 72 beetle species assessed as endangered. Odonata. Odonata includes dragonflies  and damselflies. There are 97 species and 19 subspecies in the order Odonata assessed as endangered. Platycnemidids. Species Subspecies Gomphids. Species Subspecies Calopterygids. Species Subspecies Coenagrionids. Species Subspecies Aeshnids. Species Subspecies Libellulids. Species Subspecies Other Odonata. Species Subspecies