VU

Colligyrus depressus

Unknown

Overview

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

Colligyrus depressus faces significant pressure from habitat degradation in its limited range within Southeast Asian limestone karst formations. The species is particularly vulnerable to quarrying activities and cave disturbance, which directly destroy the specialized microhabitats required for its survival. Agricultural expansion and urban development in surrounding areas further fragment its already restricted habitat, while pollution from agricultural runoff may be affecting the delicate chemical balance of its cave and karst environments.

Threat summary

Habitat

This species inhabits limestone karst formations and associated cave systems in Southeast Asia, requiring the specific microclimate conditions found in these geologically distinct environments. It is typically found in areas where limestone bedrock creates complex underground networks and specialized surface features that support unique ecological communities.

Other threatened species in AMNICOLIDAE

CR

Marstoniopsis vrbasi

Unknown
EN

Marstoniopsis armoricana

Declining
VU

Akiyoshia kobayashii

Unknown
VU

Stygian Amnicola

Amnicola stygius

Unknown

Frequently asked questions

Why is Colligyrus depressus classified as Vulnerable?
Colligyrus depressus 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. Colligyrus depressus faces significant pressure from habitat degradation in its limited range within Southeast Asian limestone karst formations. The species is particularly vulnerable to quarrying activities and cave disturbance, which directly destroy the specialized microhabitats required for its survival. Agricultural expansion and urban development in surrounding areas further fragment its already restricted habitat, while pollution from agricultural runoff may be affecting the delicate chemical balance of its cave and karst environments.
Where does Colligyrus depressus live?
Colligyrus depressus 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 Colligyrus depressus?
The main threats to Colligyrus depressus 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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