Saurophaganax ("lizard-eater") is a
genus of
allosaurid dinosaur from the
Morrison Formation of
Late Jurassic Oklahoma (latest
Kimmeridgian age, about 151 million years ago), USA. 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. The maximum size of
S. maximus has been estimated at anywhere from to in length, and around in weight.
