VU

Opisthostoma bihamulatum

Stable

Overview

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

Opisthostoma bihamulatum faces severe pressure from limestone quarrying activities that directly destroy its cave and karst habitat in Peninsular Malaysia. The species' extremely restricted range makes it particularly vulnerable to habitat modification, as entire populations can be eliminated by single quarrying operations. Agricultural expansion and urban development in surrounding areas further fragment the remaining suitable habitat, while pollution from agricultural runoff may alter the delicate chemical balance of cave ecosystems essential for this specialized snail.

Threat summary

Habitat

This species inhabits limestone caves and karst formations in the tropical forests of Peninsular Malaysia. It requires the specific microclimate conditions found within cave systems, including stable humidity and temperature levels that support the specialized ecosystem of cave-dwelling invertebrates.

Forest - Subtropical/tropical moist lowland· majorRocky areas· major

Other threatened species in DIPLOMMATINIDAE

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Diplommatina pyramis

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Opisthostoma perspectivum

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Palaina taviensis

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Acropora hemprichii

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Podocarpus ridleyi

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Frequently asked questions

Why is Opisthostoma bihamulatum classified as Vulnerable?
Opisthostoma bihamulatum 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. Opisthostoma bihamulatum faces severe pressure from limestone quarrying activities that directly destroy its cave and karst habitat in Peninsular Malaysia. The species' extremely restricted range makes it particularly vulnerable to habitat modification, as entire populations can be eliminated by single quarrying operations. Agricultural expansion and urban development in surrounding areas further fragment the remaining suitable habitat, while pollution from agricultural runoff may alter the delicate chemical balance of cave ecosystems essential for this specialized snail.
Where does Opisthostoma bihamulatum live?
Opisthostoma bihamulatum occurs in Malaysia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Opisthostoma bihamulatum?
The main threats to Opisthostoma bihamulatum 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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