A wide range of theropod dinosaurs walked the earth during the Cretaceous Era (about 143 to 66 million years ago). Researchers estimate J. casali was around 23 feet long and weighed over 2,200 lbs. J. casali is named as a tribute to the son of study co-author Lucio Ibiricu, as well as the valley’s informal name. J. casali featured sizable claws, including this one on its thumb. It’s unlikely that paleontologists will ever confirm if their J. casali specimen died while munching on its final meal.