CR

Achatinella fuscobasis

Unknown

Overview

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

Achatinella fuscobasis faces severe population decline primarily due to habitat destruction from urban development and invasive plant species that alter native forest composition. Introduced predators, particularly the rosy wolf snail (Euglandina rosea) and rats, have devastated remaining populations through direct predation. Climate change compounds these pressures by shifting suitable habitat zones upslope, while the species' extremely limited dispersal ability prevents natural recolonization of degraded areas.

Threat summary

Habitat

This endemic Hawaiian tree snail inhabits native mesic and wet forests on Oahu, typically found on native trees and shrubs in areas with high humidity and moderate temperatures. The species requires intact native forest canopy and is particularly associated with ohia lehua (Metrosideros polymorpha) and koa (Acacia koa) trees.

TERRESTRIAL· major

Other threatened species in ACHATINELLIDAE

VU

Lamellidea biplicata

Unknown
VU

Lamellidea ogasawarana

Unknown
EN

Newcombia lirata

Unknown
EN

Newcombia canaliculata

Unknown

Frequently asked questions

Why is Achatinella fuscobasis classified as Critically Endangered?
Achatinella fuscobasis 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. Achatinella fuscobasis faces severe population decline primarily due to habitat destruction from urban development and invasive plant species that alter native forest composition. Introduced predators, particularly the rosy wolf snail (Euglandina rosea) and rats, have devastated remaining populations through direct predation. Climate change compounds these pressures by shifting suitable habitat zones upslope, while the species' extremely limited dispersal ability prevents natural recolonization of degraded areas.
Where does Achatinella fuscobasis live?
Achatinella fuscobasis 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 Achatinella fuscobasis?
The main threats to Achatinella fuscobasis 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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