List of vulnerable invertebrates

In July 2016, the International Union for Conservation of Nature (IUCN) listed 2178 vulnerable invertebrate species.^[1] Of all evaluated invertebrate species, 12% are listed as vulnerable. The IUCN also lists 47 invertebrate subspecies as vulnerable.

No subpopulations of invertebrates have been evaluated by the IUCN.

For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild". Endangered and critically endangered species also meet the quantitative criteria of vulnerable species, and are listed separately. See: List of endangered invertebrates, List of critically endangered invertebrates. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species by the IUCN.

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 vulnerable invertebrate species and subspecies as evaluated by the IUCN.

• Nightingale ribbon worm (Katechonemertes nightingaleensis)

• Giant Palouse earthworm (Driloleirus americanus)

There are 879 mollusc species and 18 mollusc subspecies assessed as vulnerable.

There are 828 gastropod species and 16 gastropod subspecies assessed as vulnerable.

Stylommatophora includes the majority of land snails and slugs. There are 339 species and six subspecies in the order Stylommatophora assessed as vulnerable.

Species

Subspecies

• Anauchen informis informis
• Anauchen informis parcedentata

Species

Subspecies

• Hemicycla glyceia silensis

Species

Subspecies

• Leptaxis simia portosancti

Species

Subspecies

• Chlorilis hungerfordiana rufopila
• Spelaeodiscus triarius tatricus

There are 324 species and seven subspecies in the order Littorinimorpha assessed as vulnerable.

Species

Subspecies

There are 55 species in the order Sorbeoconcha assessed as vulnerable.

• Esperiana sangarica
• Melanopsis subgraellsiana

Species

Subspecies

• Renea moutonii moutonii
• Renea moutonii singularis

Species

Subspecies

• Gyraulus connollyi exilis

There are 27 species in the order Neogastropoda assessed as vulnerable.

• Zospeum biscaiense
• Zospeum exiguum

There are 49 species and two subspecies in the class Bivalvia assessed as vulnerable.

There are 37 species and two subspecies in the order Unionoida assessed as vulnerable.

• Margaritifera middendorffi

Species

Subspecies

• Lampsilis reeviana reeviana

Species

Subspecies

• Chambardia wahlbergi guillaini

• Diplodontites olssoni

• Scaphula nagarjunai

• Opisthoteuthis calypso
• Opisthoteuthis massyae

There are 203 species in the phylum Cnidaria assessed as vulnerable.

• Millepora foveolata
• Millepora latifolia

There are 202 species in the class Anthozoa assessed as vulnerable.

There are 199 species in the order Scleractinia assessed as vulnerable.

There are 1080 arthropod species and 29 arthropod subspecies assessed as vulnerable.

There are 47 arachnid species assessed as vulnerable.

Maxillopoda includes barnacles, copepods and a number of related animals. There are 71 species in the class Maxillopoda assessed as vulnerable.

There are 47 species in the order Calanoida assessed as vulnerable.

• Epischura baikalensis

There are 18 species in the order Harpacticoida assessed as vulnerable.

• Leptocaris stromatolicolus

• Nitocrella slovenica
• Nitocrella stochi

Malacostraca includes crabs, lobsters, crayfish, shrimp, krill, woodlice, and many others. There are 307 malacostracan species and 14 malacostracan subspecies assessed as vulnerable.

Species

Subspecies

There are 56 amphipod species and four amphipod subspecies assessed as vulnerable.

Subspecies

• Hadzia fragilis stochi

• Paramelita flexa

Species

Subspecies

There are 224 decapod species and seven decapod subspecies assessed as vulnerable.

Species

Subspecies

There are 608 insect species and 15 insect subspecies assessed as vulnerable.

• Otway stonefly (Eusthenia nothofagi)
• Mount Kosciusko wingless stonefly (Leptoperla cacuminis)

• Mount St Helens' grylloblattid (Grylloblatta chirurgica)

There are 137 species in the order Orthoptera assessed as vulnerable.

There are 155 species in the order Hymenoptera assessed as vulnerable.

• Melitta hispanica
• Melitta kastiliensis

• Wallace's giant bee (Megachile pluto)

Lepidoptera comprises moths and butterflies. There are 128 species and ten subspecies in the order Lepidoptera assessed as vulnerable.

• Small lappet moth (Phyllodesma ilicifolia)

Species

Subspecies

• Dakota skipper (Hesperia dacotae)
• Cinquefoil skipper (Pyrgus cirsii)

There are 50 beetle species assessed as vulnerable.

Odonata includes dragonflies and damselflies. There are 129 species and five subspecies in the order Odonata assessed as vulnerable.

Species

Subspecies

• Erpetogomphus lampropeltis lampropeltis

Species

Subspecies

• Lists of IUCN Red List vulnerable species
• List of least concern invertebrates
• List of near threatened invertebrates
• List of endangered invertebrates
• List of critically endangered invertebrates
• List of recently extinct invertebrates
• List of data deficient invertebrates
• Cernuellopsis