CR

Elimia troostiana

Declining

Overview

Elimia troostiana, the Mossy Elimia, is a species of freshwater snail with an operculum, aquatic gastropod mollusc in the family Pleuroceridae. This species is endemic to the Mossy Creek district of Jefferson County, Tennessee in the United States, for which it is named.

Elimia troostiana faces severe threats from habitat degradation and water quality deterioration in Tennessee's river systems. Dam construction and channelization have altered natural flow regimes critical for this freshwater snail's survival. Agricultural runoff and urban development have introduced pollutants and sedimentation that degrade the clean, well-oxygenated waters this species requires.

Threat summary

Habitat

Elimia troostiana inhabits clean, flowing freshwater streams and rivers in Tennessee, typically found on rocky substrates in well-oxygenated waters. This aquatic gastropod requires stable water conditions with minimal sedimentation and pollution.

Wetlands (inland)· major

Conservation measures underway

Species recovery

Other threatened species in PLEUROCERIDAE

EN

Io fluvialis

Unknown
VU

Lithasia duttoniana

Unknown
VU

Lithasia salebrosa

Unknown
VU

Pleurocera curta

Unknown

Threatened in United States

VU

Lepiota echinella

Unknown
VU

Paddlefish

Polyodon spathula

Unknown
VU

Copper Shark

Carcharhinus brachyurus

Declining
EN

Lyophyllum deliberatum

Unknown

Frequently asked questions

Why is Elimia troostiana classified as Critically Endangered?
Elimia troostiana 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. Elimia troostiana faces severe threats from habitat degradation and water quality deterioration in Tennessee's river systems. Dam construction and channelization have altered natural flow regimes critical for this freshwater snail's survival. Agricultural runoff and urban development have introduced pollutants and sedimentation that degrade the clean, well-oxygenated waters this species requires.
Where does Elimia troostiana live?
Elimia troostiana occurs in 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 Elimia troostiana?
The main threats to Elimia troostiana 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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