EN

Somanniathelphusa taiwanensis

Unknown

Overview

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

Somanniathelphusa taiwanensis faces severe pressure from habitat degradation in Taiwan's freshwater systems, where agricultural runoff and urban development have compromised water quality in its native streams. Dam construction and water extraction for human use have altered natural flow regimes, fragmenting populations and reducing suitable breeding habitat. The species' limited distribution makes it particularly vulnerable to localized environmental changes and pollution events.

Threat summary

Habitat

This freshwater crab inhabits clean, well-oxygenated streams and rivers in Taiwan's mountainous regions, typically found under rocks and in crevices along rocky substrates. The species requires pristine water conditions and is sensitive to pollution and sedimentation.

Conservation measures underway

Site/area protection

Other threatened species in GECARCINUCIDAE

EN

Irmengardia nemestrinus

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Somanniathelphusa zanklon

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Parathelphusa nagasakti

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EN

Lepidothelphusa cognetti

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Acropora hemprichiiEN

Acropora hemprichii

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Pseudotsuga sinensis

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Montipora taiwanensis

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Frequently asked questions

Why is Somanniathelphusa taiwanensis classified as Endangered?
Somanniathelphusa taiwanensis is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Somanniathelphusa taiwanensis faces severe pressure from habitat degradation in Taiwan's freshwater systems, where agricultural runoff and urban development have compromised water quality in its native streams. Dam construction and water extraction for human use have altered natural flow regimes, fragmenting populations and reducing suitable breeding habitat. The species' limited distribution makes it particularly vulnerable to localized environmental changes and pollution events.
Where does Somanniathelphusa taiwanensis live?
Somanniathelphusa taiwanensis occurs in Taiwan. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Somanniathelphusa taiwanensis?
The main threats to Somanniathelphusa taiwanensis 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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