Ololygon carnevallii is a species of frogs in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests, freshwater lakes, and freshwater marshes. It is threatened by habitat loss. References carnevallii Endemic fauna of Brazil Frogs of South America Amphibians described in 1989 Taxa named by Ulisses Caramaschi Taxonomy articles created by Polbot