Discula lyelliana
Encyclopedia
Discula lyelliana is an extinct species
of air-breathing land snail
, a terrestrial
pulmonate gastropod mollusk in the family Hygromiidae
, the hairy snails and their allies.
Discula lyelliana was listed as Critically endangered in the 1996 IUCN Red List
, but it is considered to be extinct.
, Madeira.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of air-breathing land snail
Land snail
A land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...
, a terrestrial
Terrestrial animal
Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...
pulmonate gastropod mollusk in the family Hygromiidae
Hygromiidae
Hygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.-Anatomy:...
, the hairy snails and their allies.
Discula lyelliana was listed as Critically endangered in the 1996 IUCN Red List
IUCN Red List
The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...
, but it is considered to be extinct.
Distribustion
This species was endemic to Deserta Grande IslandDeserta Grande Island
The Deserta Grande Island is the main island of the Desertas Islands, a small chain of islands in the archipelago of Madeira, located to the southeast of the island of Madeira. The island is a nature reserve with a manned base halfway along the western side...
, Madeira.