Prionosuchus Placodus is an extinct genus of prehistoric amphibian that lived during the Middle Permian period, approximately 270 million years ago. It is one of the earliest known examples of a reptiliomorph, a group of primitive reptiles that are closely
From Wikipedia
Prionosuchus is an extinct genus of large temnospondyl. A single species P. plummeri, is recognized from the Early Permian. Its fossils have been found in what is now northeastern Brazil.