On the shores of a lake, the small reptile Captorhinus aguti is surprised by the temnospondyl Procuhy nazariensis, the "fire frog". This name comes from the Timbira language (prôt=frog + cuhy=fire), native from Maranhão, Piauí and Tocantins (brazilian states), and refers to the amphibian being found in the Pedra de Fogo Formation (what means "Rock of Fire" in portuguese).