''Partula faba'' (bean snail, Partula snail,
" Island Biodiversity. Accessed July 31, 2022.) is an extinct

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

of air-breathing

tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...

land snail, a

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

pulmonate gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Partulidae Partulidae is a family of air-breathing land snails, terrestrial gastropod mollusks in the superfamily Pupilloidea.MolluscaBase eds. (2021). MolluscaBase. Partulidae Pilsbry, 1900. Accessed through: World Register of Marine Species at: http:/ ...

. This species was

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 els ...

Ra'iātea Raiatea or Ra'iatea ( Tahitian: ''Ra‘iātea'') is the second largest of the Society Islands, after Tahiti, in French Polynesia. The island is widely regarded as the "centre" of the eastern islands in ancient Polynesia and it is likely that the ...

and

Tahaa Taha’a (sometimes spelled as "Tahaa") is an island located among the western group, the Leeward Islands, of the Society Islands in French Polynesia, an overseas territory of France in the Pacific Ocean. The islands of Taha’a and neighboring ...

, neighbouring islands which share the same lagoon, in

French Polynesia )Territorial motto: ( en, "Great Tahiti of the Golden Haze") , anthem = , song_type = Regional anthem , song = "Ia Ora 'O Tahiti Nui" , image_map = French Polynesia on the globe (French Polynesia centered).svg , map_alt = Location of French ...

. The species was the first '' Partula'' to be recorded.

In captivity

From 1991 zoos in the United Kingdom fought to save this species from extinction. For a while this was successful but a slow decline set in.

Bristol Zoo Bristol Zoo was a zoo in the city of Bristol in South West England. The zoo's stated mission was to "maintain and defend” biodiversity through breeding endangered species, conserving threatened species and habitats and promoting a wider unders ...

and then

Edinburgh Zoo Edinburgh Zoo, formerly the Scottish National Zoological Park, is an non-profit zoological park in the Corstorphine area of Edinburgh, Scotland. The land lies on the south facing slopes of Corstorphine Hill, from which it provides extensive ...

were entrusted with the last-known colony of these snails."Bristol Zoo hopes to save last colony of tree snail "
BBC News, April 15, 2010. This was not a success and the last snail died in February 2016.

Subspecies

The species contained two subspecies. *''Partula faba'' ssp. ''faba'' –

Raiatea Raiatea or Ra'iatea ( Tahitian: ''Ra‘iātea'') is the second largest of the Society Islands, after Tahiti, in French Polynesia. The island is widely regarded as the "centre" of the eastern islands in ancient Polynesia and it is likely that the ...

*''Partula faba'' ssp. ''subangulata'' –

Reasons for decline

The introduction of the small carnivorous snail ''

Euglandina rosea ''Euglandina rosea'', the rosy wolfsnail or cannibal snail, is a species of medium-sized to large predatory air-breathing land snail, a carnivorous terrestrial pulmonate gastropod mollusk in the family Spiraxidae.MolluscaBase eds. (2020). Mollus ...

'' in the 1980s caused the decline of many native species of

, among them ''Partula faba''.

Notes

References

External links

*
''Partula faba'' on PartulaPages
Partula (gastropod) Extinct gastropods Gastropods described in 1791 Taxa named by Johann Friedrich Gmelin Taxonomy articles created by Polbot {{Partulidae-stub