CR

Phallotorynus fasciolatus

Declining

Overview

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

Phallotorynus fasciolatus faces severe population decline due to extensive habitat destruction from urban expansion and agricultural conversion in its restricted range. Water pollution from industrial runoff and domestic sewage has degraded the pristine freshwater systems this species requires for reproduction. The introduction of non-native fish species has created additional competitive pressure and predation risks in its already limited habitat.

Threat summary

Habitat

This small freshwater fish inhabits clear, slow-flowing streams and shallow pools in coastal lowland areas of southeastern Brazil. It requires well-oxygenated waters with dense aquatic vegetation and sandy or muddy substrates for feeding and breeding.

FRESHWATER· major

Conservation measures underway

Ex-situ conservation

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Frequently asked questions

Why is Phallotorynus fasciolatus classified as Critically Endangered?
Phallotorynus fasciolatus 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. Phallotorynus fasciolatus faces severe population decline due to extensive habitat destruction from urban expansion and agricultural conversion in its restricted range. Water pollution from industrial runoff and domestic sewage has degraded the pristine freshwater systems this species requires for reproduction. The introduction of non-native fish species has created additional competitive pressure and predation risks in its already limited habitat.
Where does Phallotorynus fasciolatus live?
Phallotorynus fasciolatus 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 Phallotorynus fasciolatus?
The main threats to Phallotorynus fasciolatus 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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