Species: L. argestes Order: Saurischia Suborder: Theropoda Family: Tyrannosauridae Genus: Lythronax Fossil Details Location: Grand Staircase-Escalante National Monument, Utah, USA Formation: Wahweap Formation Period: Late Cretaceous, approx. 80 million years ago Fossils: Parts of the skull, jaw, vertebrae, pelvis, and leg bones were discovered. The first specimen found is estimated to be a near-adult individual. Scientific Name: Lythronax argestes Meaning: King of Gore Length: Estimated 7–8m Weight: Estimated around 2.5 tons Diet: Carnivorous Locomotion: Bipedal Weaponry: Massive jaws + sharp teeth Characteristics: Short and broad skull, powerful bite. Since it lived 80 million years ago, it is a crucial dinosaur for understanding the evolution of tyrannosaurids.