CR

Gruta Button Frog

Cycloramphus valae

Unknown

Overview

Cycloramphus valae is a species of frog in the family Cycloramphidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forest and rivers. It is threatened by habitat loss.

Cycloramphus valae faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' dependence on pristine stream environments makes it particularly vulnerable to water pollution and sedimentation from nearby human activities. Climate change poses an additional threat by altering precipitation patterns and stream flow regimes essential for its reproductive cycle.

Threat summary

Habitat

This critically endangered frog inhabits pristine rocky streams and adjacent riparian forests within Brazil's Atlantic Forest biome. It requires clean, fast-flowing water with rocky substrates for breeding and depends on the humid microclimate of intact forest canopy.

Forest· majorForest - Subtropical/tropical moist lowland· majorRocky areas· major

Conservation measures underway

Species managementSpecies recoveryEx-situ conservation

Other threatened species in CYCLORAMPHIDAE

EN

Izecksohn's Button Frog

Cycloramphus izecksohni

Declining
CR

Petropolis River Frog

Thoropa petropolitana

Unknown
CR

Carvalho's Button Frog

Cycloramphus heyeri

Declining
CR

Lutz's River Frog

Thoropa lutzi

Unknown

Frequently asked questions

Why is Gruta Button Frog classified as Critically Endangered?
Gruta Button Frog 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. Cycloramphus valae faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' dependence on pristine stream environments makes it particularly vulnerable to water pollution and sedimentation from nearby human activities. Climate change poses an additional threat by altering precipitation patterns and stream flow regimes essential for its reproductive cycle.
Where does Gruta Button Frog live?
Gruta Button Frog 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 Gruta Button Frog?
The main threats to Gruta Button Frog are 2.1, 2.3, 4.1, and 5.3. The full IUCN-classified threat record for this species is detailed on the species page.

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