Phyllomedusa sauvagii, commonly known as the waxy monkey tree frog, waxy monkey frog or painted-bellied tree frog is a hylid frog belonging to the subfamily of South and Central American leaf frogs, Phyllomedusinae, that inhabits the Chaco of Argentina, Bolivia, Paraguay and Brazil. The subfamily consists of around 50 species in three well-known genera, Phyllomedusa, Agalychnis, and Pachymedusa. The vast majority of known species, including Phyllomedusa sauvagei, belong to the genus Phyllomedusa.