VU

Pleurocera annulifera

Unknown

Overview

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

Pleurocera annulifera faces severe population declines primarily due to water pollution from agricultural runoff and urban development within its limited Tennessee River system range. Dam construction and river channelization have significantly altered the natural flow regimes and substrate composition essential for this freshwater gastropod's survival. Sedimentation from erosion has degraded the rocky substrates where these snails feed and reproduce, while invasive zebra mussels compete for resources and alter ecosystem dynamics.

Threat summary

Habitat

This freshwater snail inhabits rocky substrates in medium to large rivers within the Tennessee River drainage system, particularly favoring areas with moderate to swift currents. The species requires clean, well-oxygenated waters with stable cobble and boulder substrates for feeding on periphyton and reproduction.

Other threatened species in PLEUROCERIDAE

VU

Pleurocera curta

Unknown
VU

Pleurocera alveare

Unknown
VU

Pleurocera walkeri

Unknown
EN

Rough Hornsnail

Pleurocera foremani

Declining

Frequently asked questions

Why is Pleurocera annulifera classified as Vulnerable?
Pleurocera annulifera is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Pleurocera annulifera faces severe population declines primarily due to water pollution from agricultural runoff and urban development within its limited Tennessee River system range. Dam construction and river channelization have significantly altered the natural flow regimes and substrate composition essential for this freshwater gastropod's survival. Sedimentation from erosion has degraded the rocky substrates where these snails feed and reproduce, while invasive zebra mussels compete for resources and alter ecosystem dynamics.
Where does Pleurocera annulifera live?
Pleurocera annulifera 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 Pleurocera annulifera?
The main threats to Pleurocera annulifera 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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