Sphaenorhynchus
Sphaenorhynchus  is a genus of frogs. They are in the family Hylidae. They are the lime treefrogs or hatchet-faced treefrogs. They live in the places where water goes into the Amazon and Orinoco Rivers in South America. They live in the Guianas, Trinidad, and Brazil. Most of them live in Brazil in the Atlantic Forest.