Polynesian Tree Snail
CR

Polynesian Tree Snail

Samoana inflata

Declining

Photo: Photo: Wikimedia Commons, CC BY-SA

Overview

Samoana inflata was a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Partulidae. It was endemic to Hiva Oa and Tahuata in the Marquesas Islands and went extinct in the 1990s or 2000s.

Samoana inflata faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development across its limited range in Samoa. Introduced predatory species, particularly the rosy wolf snail (Euglandina rosea), pose an additional critical threat to remaining populations. The species' restricted distribution and specialized habitat requirements make it extremely vulnerable to environmental changes and human disturbance.

Threat summary

Habitat

This endemic land snail inhabits native rainforest environments in Samoa, typically found in moist leaf litter and on vegetation in undisturbed forest areas. The species requires specific humidity and temperature conditions found only in intact tropical forest ecosystems.

Conservation measures underway

Species recovery

Frequently asked questions

Why is Polynesian Tree Snail classified as Critically Endangered?
Polynesian Tree Snail 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. Samoana inflata faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development across its limited range in Samoa. Introduced predatory species, particularly the rosy wolf snail (Euglandina rosea), pose an additional critical threat to remaining populations. The species' restricted distribution and specialized habitat requirements make it extremely vulnerable to environmental changes and human disturbance.
Where does Polynesian Tree Snail live?
Polynesian Tree Snail occurs in French Polynesia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Polynesian Tree Snail?
The main threats to Polynesian Tree Snail are 8.1, ai-1, ai-2, and ai-3. The full IUCN-classified threat record for this species is detailed on the species page.

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