 New fossil material ready for extraction. Extracting Species Profile Prosoratosaurus The most ancient fossil relative of the Tyrannosaurus rex. This dinosaur was discovered from a single incomplete skull found in England, Europe. Extracting Species Profile Acrocanthosaurus, meaning high-spined lizard. This large dinosaur slumped its head downward to maintain balance due to the shape of its inner ear. Extracting Species Profile Horarosaurus One of the oldest and most primitive meat-eating dinosaurs. It had a long, narrow skull and lots of serrated teeth for tearing into the flesh of its prey.