Deinonychus antirrhopus Name Meaning: "Terrible Claw". Age: 115–108 Million Years Ago. length: 3.4 meters (11 ft 2 inches). hip height: .87 meters (2.9 ft). body mass: 60-73 kg (220 lbs). physical attributes: seventy curved, blade-like teeth. narrow snout. possessed large "hands" (manus) with three claws on each forelimb. The first digit was shortest and the second was longest. Each hind foot bore a sickle-shaped claw on the second digit, which was probably used during predation. had feathers.