''Leiostyla relevata'' is a species of small air-breathing land snail in the family

Lauriidae Lauriidae is a family of land snails. It is classified within the informal group Orthurethra, itself belonging to the clade Stylommatophora within the clade Eupulmonata (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005) ...

. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to Ilhéu de Baixo, an islet near

Porto Santo Island Porto Santo Island () is a Portuguese island northeast of Madeira Island in the North Atlantic Ocean; it is the northernmost and easternmost island of the archipelago of Madeira, located in the Atlantic Ocean west of Europe and Africa. The munic ...

in the Madeira archipelago. This snail is only known from a single site on the wet seaside cliffs of the islet. The population, though small, is likely stable because the island is isolated from most threats.

References

Leiostyla Endemic fauna of Madeira Molluscs of Madeira Porto Santo Island Gastropods described in 1878 Taxonomy articles created by Polbot {{Pupillidae-stub