The conservation status of New Zealand terrestrial Gastropoda excluding Powelliphanta

Abstract

The conservation status of Gastropoda, excluding taxa in the genus Powelliphanta and those in freshwater, are listed. Forty-seven taxa are Threatened and comprise 28 that are Nationally Critical, 11 that are Nationally Endangered and eight that are Nationally Vulnerable. A further 259 are At Risk, comprising five Declining, 50 Relict and 204 Naturally Uncommon taxa. In addition, 138 taxa are Data Deficient; no taxa are listed as Extinct. Factors that contribute towards New Zealand landsnails becoming threatened are discussed.

Keywords:

• Charopidae
• landsnails
• Placostylus
• Punctidae
• threatened species

Acknowledgements

We thank Gary Barker, Landcare Research Ltd, for providing information, on the athoracophorid slugs and for help in determining their threat status, and Bruce Marshall for access to the collection in the National Museum of New Zealand and for assignment and checking of voucher numbers (NMNZ).