IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

This species is native to New Zealand and its offshore islands (Kerans et al. 2005). The species was introduced to southern Australia, Tasmania and Europe during the 19th and 20th centuries. It is thought to have first arrived in Britain via drinking water barrels in ships from Australia, and spread to the European mainland (Ponder 1988). The species has spread to North America, where it was first recorded in the Snake River, Idaho in 1987. The population has since spread to the Great Lakes region, Owens River, Colarado River, and into the Greater Yellowstone ecosystem (Kerans et al. 2005). The species has been reported in Japan (Shimada and Urabe 2003 cited in Alonso and Castro-Díez 2008), and more recently in Canada (Davidson et al. 2008). Shells of the species have also been found in Turkey, Lebanon and Iraq (Naser and Son 2009).

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Source: IUCN

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