Gonyostomus gonyostomus
CR

Gonyostomus gonyostomus

Unknown

Photo: (c) edvandroabreuribeiro, some rights reserved (CC BY-NC), uploaded by edvandroabreuribeiro

Overview

Gonyostomus goniostomus is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Odontostomidae.

Gonyostomus gonyostomus faces severe population decline primarily due to extensive deforestation and habitat fragmentation across its limited range in South American river systems. Dam construction and water diversions have altered natural flow regimes critical for this freshwater fish's reproductive cycles. Pollution from agricultural runoff and mining activities has degraded water quality in remaining habitat patches, while overfishing pressure has further reduced already small populations.

Threat summary

Habitat

This freshwater fish inhabits clear, fast-flowing rivers and streams in tropical South American watersheds, typically in areas with rocky substrates and well-oxygenated water. It prefers sections with moderate current and abundant riparian forest cover that provides shade and organic matter input.

Other threatened species in STROPHOCHEILIDAE

CR

Hirinaba curytibana

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Megalobulimus parafragilior

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Frequently asked questions

Why is Gonyostomus gonyostomus classified as Critically Endangered?
Gonyostomus gonyostomus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Gonyostomus gonyostomus faces severe population decline primarily due to extensive deforestation and habitat fragmentation across its limited range in South American river systems. Dam construction and water diversions have altered natural flow regimes critical for this freshwater fish's reproductive cycles. Pollution from agricultural runoff and mining activities has degraded water quality in remaining habitat patches, while overfishing pressure has further reduced already small populations.
Where does Gonyostomus gonyostomus live?
Gonyostomus gonyostomus 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 Gonyostomus gonyostomus?
The main threats to Gonyostomus gonyostomus 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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