A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as known only by living members kept in captivity or as a naturalized population outside its historic range due to massive habitat loss.
The insular vole or St. Matthew Island vole is a species of rodent in the family Cricetidae. It occurs only on St. Matthew Island and the adjacent Hall Island, in Alaska. On these Bering Sea islands, insular voles live in damp lowland areas, on the lower slopes of mountains, and on rye grass-covered beaches. They are diurnal and eat plant matter. Birds and Arctic foxes prey on the voles.
Aglaodiaptomus marshianus is a species of calanoid copepod in the family Diaptomidae.
Calconiscellus is a genus of crustacean in family Trichoniscidae. One species, C. gotscheensis, is listed as vulnerable on the IUCN Red List.
Fibulacamptus bisetosus is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Australia.
Fibulacamptus gracilior is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Australia.
Haplophthalmus is a genus of woodlice in family Trichoniscidae. It contains 47 described species, of which two are listed as vulnerable species on the IUCN Red List – Haplophthalmus abbreviatus and Haplophthalmus rhinoceros.
Haplophthalmus rhinoceros is a species of woodlouse in the family Trichoniscidae. It is found in Europe and Northern Asia.
Hesperodiaptomus augustaensis is a species of calanoid copepod in the family Diaptomidae.
Hesperodiaptomus californiensis is a species of calanoid copepod in the family Diaptomidae.
Nitocrella slovenica is a species of harpacticoid copepod in the family Ameiridae.
Spelaeoecia bermudensis is a species of ostracod in the family Deeveyidae.
Thermosphaeroma macrura is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Thermosphaeroma milleri is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Thermosphaeroma smithi is a species of isopod in the family Sphaeromatidae. It is found in Mexico.
Tropodiaptomus falcatus is a species of calanoid copepod in the family Diaptomidae.
Tropodiaptomus madagascariensis is a species of calanoid copepod in the family Diaptomidae.
Tropodiaptomus worthingtoni is a species of calanoid copepod in the family Diaptomidae.
Trichoniscidae are a family of isopods (woodlice), including the most abundant British woodlouse, Trichoniscus pusillus.
Siphonophoridae is a family of millipede in the order Siphonophorida. There are about 12 genera and more than 110 described species in Siphonophoridae.
