EN

Shortface Lanx

Fisherola nuttallii

Unknown

Overview

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

The Shortface Lanx faces severe threats from dam construction and water diversions that alter the natural flow regimes of its cold-water stream habitats. Sedimentation from agricultural runoff and urban development degrades the clean gravel and cobble substrates essential for this freshwater limpet's survival. Climate change compounds these pressures by increasing water temperatures beyond the species' thermal tolerance and reducing snowpack that feeds its mountain stream ecosystems.

Threat summary

Habitat

The Shortface Lanx inhabits cold, fast-flowing mountain streams and rivers with clean gravel and cobble substrates in the Pacific Northwest. This freshwater limpet requires well-oxygenated waters with stable temperatures and minimal sedimentation to maintain viable populations.

FRESHWATER· major

Threatened in Canada

Calidris ferrugineaVU

Calidris ferruginea

Declining
EN

Lake Lamprey

Entosphenus macrostoma

Unknown
EN

Nymphaea loriana

Declining
Coregonus huntsmaniCR

Coregonus huntsmani

Unknown

Frequently asked questions

Why is Shortface Lanx classified as Endangered?
Shortface Lanx is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. The Shortface Lanx faces severe threats from dam construction and water diversions that alter the natural flow regimes of its cold-water stream habitats. Sedimentation from agricultural runoff and urban development degrades the clean gravel and cobble substrates essential for this freshwater limpet's survival. Climate change compounds these pressures by increasing water temperatures beyond the species' thermal tolerance and reducing snowpack that feeds its mountain stream ecosystems.
Where does Shortface Lanx live?
Shortface Lanx occurs in Canada, and United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Shortface Lanx?
The main threats to Shortface Lanx 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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