Variation in the skulls of theropod dinosaurs: the Late Triassic coelophysoid Coelophysis; the Early Jurassic ceratosaur Ceratosaurus; the Late Jurassic allosaur Allosaurus; the middle Cretaceous spinosaur Suchomimus; the Late Cretaceous dromaeosaur Velociraptor; the Late Cretaceous tyrannosaur Tyrannosaurus.
From Scott Sampson’s Dinosaur Odyssey