CR

Clear Lake Pyrg

Pyrgulopsis ventricosa

Declining

Overview

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

Pyrgulopsis ventricosa faces severe threats from groundwater depletion and habitat modification in its extremely limited range. The species is vulnerable to water diversions, agricultural pumping, and urban development that alter spring flow patterns and water chemistry. Climate change poses an additional threat through increased drought frequency and reduced aquifer recharge in the arid southwestern United States.

Threat summary

Habitat

This freshwater gastropod is endemic to specific spring systems and associated wetland habitats in the southwestern United States. The species requires stable groundwater-fed springs with consistent water temperature, flow rates, and mineral content typical of desert spring ecosystems.

FRESHWATER· major

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Palacanthilhiopsis margritae

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Lepiota echinella

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Lyophyllum deliberatum

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Frequently asked questions

Why is Clear Lake Pyrg classified as Critically Endangered?
Clear Lake Pyrg 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. Pyrgulopsis ventricosa faces severe threats from groundwater depletion and habitat modification in its extremely limited range. The species is vulnerable to water diversions, agricultural pumping, and urban development that alter spring flow patterns and water chemistry. Climate change poses an additional threat through increased drought frequency and reduced aquifer recharge in the arid southwestern United States.
Where does Clear Lake Pyrg live?
Clear Lake Pyrg 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 Clear Lake Pyrg?
The main threats to Clear Lake Pyrg 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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