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 Somali hedgehog is a species of mammal in the family Erinaceidae. It is endemic to Somalia and Somaliland. The Somali hedgehog is nocturnal.
Mesoperipatus is a monospecific genus of velvet worm in the Peripatidae family, containing a single species Mesoperipatus tholloni. It is found in Gabon. This species is listed as Data Deficient on the IUCN Red List.
Speleoperipatus is a monospecific genus of velvet worm in the Peripatidae family, containing the single species Speleoperipatus spelaeus.
Perdicella carinella is a species of tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae. This species is endemic to Hawaii in the United States.
Perdicella is a genus of tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Achatinellidae. They are endemic to Hawaii and the majority of the species are extinct.
Perdicella helena is a species of tropical tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae. This species is endemic to Hawaii in the United States.
Perdicella kuhnsi is a species of tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae. This species is endemic to Hawaii in the United States.
†Perdicella maniensis was a species of tropical air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Hawaii in the United States.
Perdicella ornata is a species of tropical, tree-living, air-breathing, land snails, arboreal pulmonate gastropod mollusks in the family Achatinellidae. This species is endemic to Hawaii in the United States.
†Perdicella zebra was a species of tropical tree-living, air-breathing, land snail, an arboreal pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Hawaii in the United States.
†Perdicella zebrina was a species of tropical, tree-living, air-breathing, land snail, an arboreal pulmonate gastropod mollusk in the family Achatinellidae. This species was endemic to Hawaii in the United States.
Achatinellidae is a family of tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Pupilloidea.
Nerita fulgurans is a species of sea snail, a marine gastropod mollusk in the family Neritidae.
Plocamopherus fulgurans is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusk in the family Polyceridae.
