In July 2016, the International Union for Conservation of Nature (IUCN) listed 1163 endangered invertebrate species.^[1] 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.^[2] 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".^[3]

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

There are 507 mollusc species and nine mollusc subspecies assessed as endangered.

There are 448 gastropod species and seven gastropod subspecies assessed as endangered.

Stylommatophora includes the majority of land snails and slugs. There are 187 species and two subspecies in the order Stylommatophora assessed as endangered.

Species

Subspecies

• Stock Island tree snail (Orthalicus reses reses)

Species

Subspecies

• Tayloria urguessensis subangulata

There are 147 species and three subspecies in the order Littorinimorpha assessed as endangered.

Species

Subspecies

Species

Subspecies

• Bellamya unicolor abyssinicus
• Maizania hildebrandti thikensis

There are 22 Hygrophila species assessed as endangered.

There are 57 species and two subspecies in the class Bivalvia assessed as endangered.

There are 54 species and two subspecies in the order Unionoida assessed as endangered.

Species

Subspecies

• Catspaw (Epioblasma obliquata obliquata)
• Rough rabbitsfoot (Quadrula cylindrica strigillata)

• Cirroctopus hochbergi
• Opisthoteuthis mero

There are 28 species in the phylum Cnidaria assessed as endangered.

• Millepora striata
• Millepora tuberosa

There are 26 species in the class Anthozoa assessed as endangered.

• Crassophyllum thessalonicae

• Paranemonia vouliagmeniensis

There are 616 arthropod species and 27 arthropod subspecies assessed as endangered.

There are 72 arachnid species assessed as endangered.

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

Species

Subspecies

Species

Subspecies

• Niphargus elegans zagrebensis

There are 154 decapod species and two decapod subspecies assessed as endangered.

Species

Subspecies

• Withlocoochee light-fleeing cave crayfish (Procambarus lucifugus lucifugus)

Species

Subspecies

• Macrobrachium lamarrei lamarroides

There are 343 insect species and 21 insect subspecies assessed as endangered.

There are 91 species and two subspecies in the order Orthoptera assessed as endangered.

Species

Subspecies

• Phaloria insularis insularis

Species

Subspecies

• Isophya longicaudata longicaudata

Lepidoptera comprises moths and butterflies. There are 51 species in the order Lepidoptera assessed as endangered.

There are 72 beetle species assessed as endangered.

Odonata includes dragonflies and damselflies. There are 97 species and 19 subspecies in the order Odonata assessed as endangered.

Species

Subspecies

Species

Subspecies

Species

Subspecies

• Matrona basilaris japonica

Species

Subspecies

• Pseudagrion torridum hulae

Species

Subspecies

Species

Subspecies

Species

Subspecies

• 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