The allosaurus was a large, theropod predator that lived roughly 156 to 130 million years ago and may have grown up to 39 feet (12 m) long Cast of the large toe ungual from the towering bipedal carnivorous dinosaur of the Jurassic The original claw was unearthed in the Morrison formation at the Cleveland-Lloyd Quarry in central Utah Detailed cast replica. 7 inches. Museum quality resin cast made in the USA Cast of an actual fossil from the iconic Allosaurus (allosaurus fragilis). Complete ungual claw specimen.