EN

Hemiancistrus megalopteryx

Unknown

Overview

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

Hemiancistrus megalopteryx faces severe pressure from deforestation and agricultural expansion throughout its limited range in the Amazon basin. Dam construction and water diversions have altered natural flow patterns in the rivers where this armored catfish depends on specific current conditions for feeding and reproduction. Mining activities, particularly gold mining, introduce heavy metals and sediments that degrade water quality in the clear, fast-flowing streams this species requires.

Threat summary

Habitat

This armored catfish inhabits clear, fast-flowing rivers and streams with rocky substrates in the Amazon basin. It requires well-oxygenated waters with strong currents and prefers areas with fallen logs and rocky crevices that provide shelter and feeding opportunities.

FRESHWATER· major

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Frequently asked questions

Why is Hemiancistrus megalopteryx classified as Endangered?
Hemiancistrus megalopteryx 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. Hemiancistrus megalopteryx faces severe pressure from deforestation and agricultural expansion throughout its limited range in the Amazon basin. Dam construction and water diversions have altered natural flow patterns in the rivers where this armored catfish depends on specific current conditions for feeding and reproduction. Mining activities, particularly gold mining, introduce heavy metals and sediments that degrade water quality in the clear, fast-flowing streams this species requires.
Where does Hemiancistrus megalopteryx live?
Hemiancistrus megalopteryx occurs in Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Hemiancistrus megalopteryx?
The main threats to Hemiancistrus megalopteryx 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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