The Lord Howe flax snail or the Lord Howe placostylus, scientific name Placostylus bivaricosus, is a species of large air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Bothriembryontidae.
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.
Anguispira picta, common names painted snake-coiled forest snail and painted tigersnail, is a rare species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Discidae, the disc snails.
Achatinella fuscobasis is a species of air-breathing land snail, a terrestrial pulmonate gastropod in the family Achatinellidae. This species is endemic to Hawaii.
Advena campbelli, also known as the Campbell's keeled glass-snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicarionidae. This species is endemic to Norfolk Island. It was listed as extinct by the International Union for Conservation of Nature in 1996. However, the Australian Government lists the species as Critically Endangered, and stated in 2009 that the species' IUCN status was "incorrect and requires updating." A small living population was found in 2020.
Amphicyclotulus guadeloupensis was a species of tropical land snail with a gill and an operculum, a terrestrial gastropod mollusk in the family Neocyclotidae.
The Badwater snail is a species of minute, salt marsh snail endemic to the Badwater Basin in Death Valley. It is found only at low elevations near spring sources, and only in regions with relatively low precipitation. It is capable of living completely submerged in the spring water.
Caldwellia imperfecta is a species of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the family Euconulidae, the hive snails. This species is found in Mauritius and Réunion.
Caldwellia is a genus of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the family Euconulidae, the hive snails.
Miller's snail, scientific name Cochliopina milleri, is a species of very small freshwater snails that have an operculum, aquatic gastropod mollusks in the family Hydrobiidae, the mud snails. This species is endemic to Mexico.
The banded dune snail or Morro shoulderband(Helminthoglypta walkeriana) is a species of endangered air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the subfamily Helminthoglyptinae.
The concentrated snail also known as the Santa Barbara Island snail, scientific name Micrarionta facta, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae.
Partula taeniata, common name the Moorean viviparous tree snail, is a species of terrestrial gastropod in the Partulidae family. It is endemic to French Polynesia.
Polygyriscus is a genus of minute air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae. This is a monotypic genus of snails containing the single species Polygyriscus virginianus, known commonly as the Virginia fringed mountain snail or the Virginia coil. That species is endemic to the State of Virginia in the United States.
Succinea sanctaehelenae is a species of land snail in the family Succineidae, the amber snails. It is known commonly as the blushing snail. It is endemic to the island of Saint Helena in the South Atlantic Ocean.
Xerocrassa picardi was a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae.
