CR

Huahine Samoana Tree Snail

Samoana annectens

Unknown

Overview

Samoana annectens is a species of tropical, air-breathing land snail, a terrestrial, pulmonate, gastropod mollusc in the family Partulidae. This is one of many species known as the "Polynesian tree snail"; it is endemic to Huahine, French Polynesia.

Samoana annectens 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 areas in Samoa, typically found in leaf litter and on vegetation in humid, shaded environments. The species requires specific moisture conditions and is closely associated with undisturbed forest ecosystems at various elevations.

Forest· major

Conservation measures underway

Species recovery

Other threatened species in PARTULIDAE

Polynesian Tree SnailCR

Polynesian Tree Snail

Partula arguta

Unknown
EN

Fiji Ridged Tree Snail

Partula lirata

Unknown
VU

Palau Rock Snail

Sphendone insolita

Unknown
CR

Partula incrassa

Unknown

Threatened in French Polynesia

EN

Raiatea Fruit-dove

Ptilinopus chrysogaster

Declining
EN

Pocillopora zelli

Declining
VU

White-winged Petrel

Pterodroma leucoptera

Declining
VU

Black Petrel

Procellaria parkinsoni

Stable

Frequently asked questions

Why is Huahine Samoana Tree Snail classified as Critically Endangered?
Huahine Samoana 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 annectens 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 Huahine Samoana Tree Snail live?
Huahine Samoana 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 Huahine Samoana Tree Snail?
The main threats to Huahine Samoana 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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