Ololygon catharinae is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, freshwater marshes, and intermittent freshwater marshes. It is threatened by habitat loss. References catharinae Endemic fauna of Brazil Amphibians described in 1888 Taxonomy articles created by Polbot