CR

Alzoniella marianae

UnknownCREUCREU

Overview

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

Alzoniella marianae faces severe threats from groundwater extraction and pollution in its highly restricted karst habitat. The species' dependence on specific hydrogeological conditions makes it extremely vulnerable to water table changes and contamination from agricultural runoff and urban development in the surrounding landscape.

Threat summary

Habitat

This freshwater gastropod is endemic to underground karst aquifers and cave systems, requiring specific water chemistry and temperature conditions. It inhabits the phreatic zone of limestone formations where groundwater flows through interconnected cavities and fissures.

Wetlands (inland)· major

Conservation measures underway

Site/area managementAwareness & communications

Other threatened species in HYDROBIIDAE

VU

Wekiwa Siltsnail

Floridobia wekiwae

Unknown
VU

Floridobia monroensis

Unknown
EN

Ohrigocea stankovici

Unknown
EN

Palacanthilhiopsis margritae

Unknown

Threatened in Spain

VU

Lepiota echinella

Unknown
VU

Copper Shark

Carcharhinus brachyurus

Declining
EN

Lyophyllum deliberatum

Unknown
VU

Hemicycla invernicata

Stable

Frequently asked questions

Why is Alzoniella marianae classified as Critically Endangered?
Alzoniella marianae 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. Alzoniella marianae faces severe threats from groundwater extraction and pollution in its highly restricted karst habitat. The species' dependence on specific hydrogeological conditions makes it extremely vulnerable to water table changes and contamination from agricultural runoff and urban development in the surrounding landscape.
Where does Alzoniella marianae live?
Alzoniella marianae occurs in Spain. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Alzoniella marianae?
The main threats to Alzoniella marianae 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.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.