Campo Grande Button Frog
CR

Campo Grande Button Frog

Cycloramphus semipalmatus

Unknown

Photo: Photo: Samuel Garman (1843-1927) via Wikimedia Commons Public domain

Overview

Cycloramphus semipalmatus 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.

Cycloramphus semipalmatus faces severe threats from Atlantic Forest fragmentation and degradation, with its specialized breeding requirements making it particularly vulnerable to habitat disturbance. Urban expansion and agricultural conversion have eliminated much of its historical range, while pollution from agricultural runoff and urban development degrades remaining stream habitats essential for reproduction. Climate change poses additional risks through altered precipitation patterns that could disrupt the species' dependence on specific moisture conditions.

Threat summary

Habitat

This species inhabits Atlantic Forest streams and adjacent riparian vegetation in southeastern Brazil, requiring clean, fast-flowing water for breeding and dense forest cover for terrestrial activities. It is typically found in montane and submontane forest environments with rocky substrates and permanent water sources.

Forest· majorForest - Subtropical/tropical moist lowland· major

Conservation measures underway

Species 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

Frequently asked questions

Why is Campo Grande Button Frog classified as Critically Endangered?
Campo Grande 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 semipalmatus faces severe threats from Atlantic Forest fragmentation and degradation, with its specialized breeding requirements making it particularly vulnerable to habitat disturbance. Urban expansion and agricultural conversion have eliminated much of its historical range, while pollution from agricultural runoff and urban development degrades remaining stream habitats essential for reproduction. Climate change poses additional risks through altered precipitation patterns that could disrupt the species' dependence on specific moisture conditions.
Where does Campo Grande Button Frog live?
Campo Grande 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 Campo Grande Button Frog?
The main threats to Campo Grande Button Frog are 8.1, 8.2, 9.3.4, and 9.5. The full IUCN-classified threat record for this species is detailed on the species page.

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