CR

Sao Bento Button Frog

Cycloramphus diringshofeni

Unknown

Overview

Cycloramphus diringshofeni is a species of frog in the family Cycloramphidae. It is endemic to Brazil. Its natural habitat is subtropical or tropical moist lowland forest.

Cycloramphus diringshofeni faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' extremely limited distribution makes it particularly vulnerable to local environmental changes, while pollution from nearby human settlements degrades the pristine stream environments essential for its reproduction. Climate change poses an additional threat by altering precipitation patterns and temperature regimes in the high-altitude environments where this endemic frog persists.

Threat summary

Habitat

This critically endangered frog inhabits pristine montane Atlantic Forest streams and adjacent riparian vegetation at elevations between 800-1,200 meters. The species requires clean, fast-flowing rocky streams with dense canopy cover and stable water temperatures for breeding and larval development.

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

Conservation measures underway

Site/area protectionSpecies managementSpecies recoveryEx-situ conservation

Other threatened species in CYCLORAMPHIDAE

EN

Izecksohn's Button Frog

Cycloramphus izecksohni

Declining
CR

Carvalho's Button Frog

Cycloramphus heyeri

Declining
CR

Lutz's River Frog

Thoropa lutzi

Unknown
Brazilian Button FrogEN

Brazilian Button Frog

Cycloramphus brasiliensis

Declining

Threatened in Brazil

Striped SmoothhoundCR

Striped Smoothhound

Mustelus fasciatus

Declining
VU

Mussismilia hispida

Declining
VU

Myrcia carioca

Declining
Brasilia TapaculoEN

Brasilia Tapaculo

Scytalopus novacapitalis

Declining

Frequently asked questions

Why is Sao Bento Button Frog classified as Critically Endangered?
Sao Bento 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 diringshofeni faces severe threats from habitat destruction due to urban expansion and agricultural conversion in its restricted Atlantic Forest range. The species' extremely limited distribution makes it particularly vulnerable to local environmental changes, while pollution from nearby human settlements degrades the pristine stream environments essential for its reproduction. Climate change poses an additional threat by altering precipitation patterns and temperature regimes in the high-altitude environments where this endemic frog persists.
Where does Sao Bento Button Frog live?
Sao Bento Button Frog 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 Sao Bento Button Frog?
The main threats to Sao Bento Button Frog are 1.1, 2.1, 2.3, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

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