List of critically endangered invertebrates
As of July 2016, the International Union for Conservation of Nature lists 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct. 5.5% of all evaluated invertebrate species are listed as critically endangered.
The IUCN also lists 14 invertebrate subspecies as critically endangered.
No subpopulations of invertebrates have been evaluated by the IUCN.
Additionally 5278 invertebrate species 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 critically endangered invertebrate species and subspecies as evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.
Nemertea">Nemertina">Nemertea species
- Prosadenoporus agricola
Annelids">Annelida">Annelids
- Mesonerilla prospera
[Onychophora]
Molluscs">Mollusca">Molluscs
There are 581 mollusc species and 11 mollusc subspecies assessed as critically endangered.Gastropods">Gastropoda">Gastropods
There are 511 gastropod species and six gastropod subspecies assessed as critically endangered.[Stylommatophora]
Stylommatophora includes the majority of land snails and slugs. There are 233 species and five subspecies in the order Stylommatophora assessed as critically endangered.Amastrids">Amastridae">Amastrids
Partulids">Partulidae">Partulids
Achatinellids">Achatinellidae">Achatinellids
Endodontids">Endodontidae">Endodontids
SpeciesSubspecies
Charopids">Charopidae">Charopids
Helicarionids">Helicarionidae">Helicarionids
Orthalicids">Orthalicidae">Orthalicids
Rhytidids">Rhytididae">Rhytidids
Streptaxids">Streptaxidae">Streptaxids
Lauriids">Lauriidae">Lauriids
Helicids">Helicidae">Helicids
Hygromiids">Hygromiidae">Hygromiids
Enids">Enidae">Enids
Other Stylommatophora species
[Littorinimorpha]
There are 181 species in the order Littorinimorpha assessed as critically endangered.Hydrobiids">Hydrobiidae">Hydrobiids
Cochliopids">Cochliopidae">Cochliopids
Bithyniids">Bithyniidae">Bithyniids
Moitessieriids">Moitessieriidae">Moitessieriids
- Henrigirardia wienini
- Spiralix corsica
Assimineids">Assimineidae">Assimineids
Pomatiopsids">Pomatiopsidae">Pomatiopsids
[Sorbeoconcha]
[Architaenioglossa]
There are 48 species in the order Architaenioglossa assessed as critically endangered.Cyclophorids">Cyclophoridae">Cyclophorids
Diplommatinids">Diplommatinidae">Diplommatinids
Viviparids">Viviparidae">Viviparids
Other Architaenioglossa species
[Cycloneritimorpha]
Hygrophila">Hygrophila (gastropod)">Hygrophila
SpeciesSubspecies
- Bulinus tropicus torensis
[Neogastropoda]
Other gastropod species
[Bivalvia]
There are 69 species and five subspecies in the class Bivalvia assessed as critically endangered.[Unionida]
There are 66 species and five subspecies in the order Unionoida assessed as critically endangered.Margaritiferids">Margaritiferidae">Margaritiferids
SpeciesSubspecies
- Margaritifera margaritifera durrovensis
Etheriids">Etheriidae">Etheriids
- Acostaea rivolii
Unionids">Unionidae">Unionids
Subspecies
Hyriids">Hyriidae">Hyriids
- Glenelg freshwater mussel
[Venerida]
Cephalopods">Cephalopoda">Cephalopods
- Opisthoteuthis chathamensis
[Cnidaria]
Arthropods">Arthropoda">Arthropods
There are 394 arthropod species and three arthropod subspecies assessed as critically endangered.Centipedes">Chilopoda">Centipedes
Seed shrimps">Ostracoda">Seed shrimps
- Kapcypridopsis barnardi
- Spelaeoecia bermudensis
Arachnids">Arachnida">Arachnids
Harvestmen">Opiliones">Harvestmen
Spiders">Araneae">Spiders
Other arachnid species
[Branchiopoda]
Millipedes">Diplopoda">Millipedes
[Entognatha]
- Ceratophysella sp. nov. 'HC'
- Delamarephorura tami
[Maxillopoda]
Malacostracans">Malacostraca">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
Mictaceans">Mictacea">Mictaceans
- Mictocaris halope
Isopods">Isopoda">Isopods
Amphipods">Amphipoda">Amphipods
Decapods">Decapoda">Decapods
There are 106 decapod species and one decapod subspecies assessed as critically endangered.Parastacids">Parastacidae">Parastacids
Gecarcinucids">Gecarcinucidae">Gecarcinucids
Atyids">Atyidae">Atyids
Cambarids">Cambaridae">Cambarids
SpeciesSubspecies
- Procambarus rogersi expletus
Palaemonids">Palaemonidae">Palaemonids
Other decapod species
Insects">Insecta">Insects
There are 195 insect species and two insect subspecies assessed as critically endangered.[Blattodea]
[Orthoptera]
There are 72 species in the order Orthoptera assessed as critically endangered.Euschmidtiids">Euschmidtiidae">Euschmidtiids
Crickets">Gryllidae">Crickets
Acridids">Acrididae">Acridids
Tettigoniids">Tettigoniidae">Tettigoniids
Other Orthoptera species
[Hymenoptera]
[Lepidoptera]
Beetles">Coleoptera">Beetles
[Odonata]
SpeciesSubspecies
- Chlorogomphus brunneus keramensis
- Delphi cordulegaster
Other insect species