Hopliancistrus tricornis
EN

Hopliancistrus tricornis

Declining

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Hopliancistrus_tricornis

Overview

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

Hopliancistrus tricornis faces severe pressure from habitat degradation in the Tocantins River basin, where dam construction and water diversions have altered natural flow regimes essential for this armored catfish's reproduction. Mining activities and agricultural runoff introduce sediments and pollutants that degrade the rocky substrates this species requires for feeding and shelter. The species' restricted range in Brazilian river systems makes it particularly vulnerable to localized environmental changes.

Threat summary

Habitat

This armored catfish inhabits fast-flowing rocky areas of the Tocantins River system in central Brazil, preferring clear waters with strong currents and abundant stone substrates. The species is typically found in well-oxygenated sections of rivers and streams where it can graze on algae and organic matter attached to rocks.

FRESHWATER· major

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Frequently asked questions

Why is Hopliancistrus tricornis classified as Endangered?
Hopliancistrus tricornis 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. Hopliancistrus tricornis faces severe pressure from habitat degradation in the Tocantins River basin, where dam construction and water diversions have altered natural flow regimes essential for this armored catfish's reproduction. Mining activities and agricultural runoff introduce sediments and pollutants that degrade the rocky substrates this species requires for feeding and shelter. The species' restricted range in Brazilian river systems makes it particularly vulnerable to localized environmental changes.
Where does Hopliancistrus tricornis live?
Hopliancistrus tricornis occurs in Brazil, and United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Hopliancistrus tricornis?
The main threats to Hopliancistrus tricornis 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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