Carnotaurus, the "Meat-eating bull," is a carnivorous ceratosaurian theropod dinosaur that lives in the Lost Valley. It represents a unique group of theropod dinosaurs called abelisaurids, who lived in the late Cretaceous period, roughly between 71 and 65 million years ago, in what is now South America. The most notable feature of this dinosaur are the two small horns above its eyes, the first known carnivore to have this feature.