Spinosaurus Radius Arm found in Kem Kem Beds, Morocco. This was a monster dinosaur that was larger than T-Rex. This is in good condition with no repairs. Weight 13 oz Size: 11 1/2 x 2 1/2 x 1 1/4 inches. Spinosaurus a genus of theropod dinosaur that lived in what now is North Africa, during the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago.