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Ammonite Snail


Ammoniropa vigensAmmonite Pinwheel Snail

Group:Mollusca (shellfish), Gastropoda (snails and slugs), Stylommatophora, Charopidae
Status:Threatened Species Protection Act 1995: endangered
Environment Protection and Biodiversity Conservation Act 1999: Critically Endangered
Found only in Tasmania
Click to enlarge
​​The Ammonite Snail (Ammoniropa vigens) is a tiny, very flat land snail, yellow to off-white or greyish in colour, with a very wide umbilicus which is 30 to 40% of shell width. The Ammonite Snail is endemic to Tasmania and occurs only in the Hobart area. The species occurs in a variety of forest habitats, but has only been found under dolerite rocks. There are currently only two extant populations known, with an area of occupancy of 2 ha and a total population size of as little as 200 individuals. The principal threats to the species include fire, and urban sprawl and its associated effects - including weeds, exotic invertebrates, and habitat fragmentation. The main objective for the management of the Ammonite Snail is to decrease its extinction risk by maintaining, improving and increasing extent and quality of habitat. This species was previously known as Discocharopa vigens.

A complete species management profile is not currently available for this species. Check for further information on this page and any relevant Activity Advice.

Key Points

  • Important: Is this species in your area? Do you need a permit? Ensure you’ve covered all the issues by checking the Planning Ahead page.
  • Important: Different threatened species may have different requirements. For any activity you are considering, read the Activity Advice pages for background information and important advice about managing around the needs of multiple threatened species.



Helping the species


Cutting or clearing trees or vegetation










Changing water flow / quality


Use of chemicals




Further information

​Check also for listing statement or notesheet pdf above (below the species image).

​​Cite as: Threatened Species Section (). (): Species Management Profile for Tasmania's Threatened Species Link. ​ ​Department of Natural Resources and Environment Tasmania. Accessed on .

Contact details: Threatened Species Section, Department of Natural Resources and Environment Tasmania​, GPO Box 44, Hobart, Tasmania, Australia, 7001. Phone (1300 368 550).

Permit: A permit is required under the Tasmanian Threatened Species Protection Act 1995 to 'take' (which includes kill, injure, catch, damage, destroy and collect), keep, trade in or process any specimen or products of a listed species. Additional permits may also be required under other Acts or regulations to take, disturb or interfere with any form of wildlife or its products, (e.g. dens, nests, bones). This may also depend on the tenure of the land and other agreements relating to its management. ​​​​​