CR

Armsia petasus

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Armsia petasus faces severe population decline due to habitat destruction from coastal development and sand mining activities along its restricted range. The species' extremely limited distribution makes it particularly vulnerable to localized threats, with rising sea levels and increased storm intensity further degrading its specialized sandy beach and dune habitats. Collection pressure for the ornamental shell trade has also contributed to population reductions in accessible areas.

Threat summary

Habitat

This marine gastropod inhabits sandy beaches and shallow coastal waters, typically found in intertidal zones and nearshore sandy substrates. The species requires specific sediment conditions and is restricted to a very narrow coastal habitat range.

TERRESTRIAL· major

Other threatened species in AMASTRIDAE

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Leptachatina lepida

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Laminella sanguinea

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Frequently asked questions

Why is Armsia petasus classified as Critically Endangered?
Armsia petasus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Armsia petasus faces severe population decline due to habitat destruction from coastal development and sand mining activities along its restricted range. The species' extremely limited distribution makes it particularly vulnerable to localized threats, with rising sea levels and increased storm intensity further degrading its specialized sandy beach and dune habitats. Collection pressure for the ornamental shell trade has also contributed to population reductions in accessible areas.
Where does Armsia petasus live?
Armsia petasus occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Armsia petasus?
The main threats to Armsia petasus are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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