Saurophaganax

Saurophaganax ("lord of lizard-eaters") is a genus of allosaurid dinosaur from the Morrison Formation of Late Jurassic (latest Kimmeridgian age, about 151 million years ago) Oklahoma, United States.[1] Some paleontologists consider it to be a species of Allosaurus (A. maximus). Saurophaganax represents a very large Morrison allosaurid characterized by horizontal laminae at the bases of the dorsal neural spines above the transverse processes, and "meat-chopper" chevrons.[2] The maximum size of S. maximus has been estimated at anywhere from 10.5 meters (34 ft)[3] to 13 meters (43 ft) in length,[4] and around 3 metric tons (3.3 short tons) in weight.[3]