English: Concavenator is a genus of theropod dinosaur that lived approximately 130 million years ago during the early Cretaceous period of Spain. It was a medium-sized primitive carcharodontosaurian dinosaur, reaching up to 6 m in length and 400 kg in body mass. Concavenator possessed several unique features, including the two extremely tall vertebrae in front of the hips which formed a tall but narrow and pointed crest (possibly supporting a hump) on the dinosaur's back. It also had structures resembling quill knobs on each forearm, thought to anchor simple, hollow, quill-like structures.