CR

Ogasawarana metamorpha

Unknown

Overview

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

Ogasawarana metamorpha faces severe threats from invasive species, particularly the introduced flatworm Platydemus manokwari, which preys directly on native land snails. Habitat degradation from invasive plants and human development on the Ogasawara Islands has further reduced suitable forest environments. The species' extremely limited range makes it vulnerable to stochastic events and local extinctions.

Threat summary

Habitat

This endemic land snail inhabits the native forests of the Ogasawara Islands (Bonin Islands), Japan, particularly in moist understory environments with leaf litter and decaying organic matter. The species requires the specific microclimate conditions found in the islands' remaining native forest patches.

TERRESTRIAL· major

Other threatened species in HELICINIDAE

Ogasawarana rexCR

Ogasawarana rex

Unknown
EN

Helicina rostrata

Unknown
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Ogasawarana habei

Unknown
CR

Ogasawarana yoshiwarana

Unknown

Frequently asked questions

Why is Ogasawarana metamorpha classified as Critically Endangered?
Ogasawarana metamorpha 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. Ogasawarana metamorpha faces severe threats from invasive species, particularly the introduced flatworm Platydemus manokwari, which preys directly on native land snails. Habitat degradation from invasive plants and human development on the Ogasawara Islands has further reduced suitable forest environments. The species' extremely limited range makes it vulnerable to stochastic events and local extinctions.
Where does Ogasawarana metamorpha live?
Ogasawarana metamorpha 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 Ogasawarana metamorpha?
The main threats to Ogasawarana metamorpha 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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