| Helenoconcha minutissima | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Family: | Charopidae |
| Genus: | Helenoconcha |
| Species: | †H. minutissima |
| Binomial name | |
| †Helenoconcha minutissima Smith, 1892 | |
Helenoconcha minutissima is an extinct species of gastropod in the family Charopidae. It was endemic to Saint Helena.
A species that is extinct in the wild (EW) is one that has been categorized by the International Union for Conservation of Nature as only consisting of living members kept in captivity or as a naturalized population outside its historic range. Classification requires exhaustive surveys conducted within the species' known habitat with consideration given to seasonality, time of day, and life cycle. Once a species is classified as EW, the only way for it to be downgraded is through reintroduction.
The Somali hedgehog is a species of mammal in the family Erinaceidae. It is endemic to Somalia and Somaliland. The Somali hedgehog is nocturnal.
The pale gray shrew is a species of mammal in the family Soricidae. It is endemic to Pakistan and is distributed in the Shigar valley and the western edge of Deosai.
†Helenoconcha leptalea is an extinct species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae.
Helenoconcha is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae endemic to the island of Saint Helena, hence the genetic epithet. All species save for H. relicta, are extinct.
†Helenoconcha polyodon was a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae.
†Helenoconcha pseustes was a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae.
†Helenoconcha sexdentata was a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae.
Hemistomia is a genus of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Tateidae.
Hemistomia minutissima is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae. This species is endemic to Australia, where it is only known from the Erskine Valley, on the southern part of Lord Howe Island.
A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction unless the circumstances that are threatening its survival and reproduction improve.
Carinapex is a genus of sea snails, marine gastropod mollusks in the family Horaiclavidae.
The Ammonite Snail is a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae. The species is endemic to Saint Helena Island, and is the only Helenoconcha species remaining.
Endangered species, as classified by the International Union for Conservation of Nature (IUCN), are species which have been categorized as very likely to become extinct in their known native ranges in the near future. On the IUCN Red List, endangered is the second-most severe conservation status for wild populations in the IUCN's schema after critically endangered. In 2012, the IUCN Red List featured 3,079 animal and 2,655 plant species as endangered worldwide. The figures for 1998 were 1,102 and 1,197 respectively.
