Albertosaurus, maxilla Troodon They are cast in very

They are cast in very dense hydrostone and finished with actual dig site matrix so that it is very difficult to tell the casts from the actual bones

triangular spikes may have protruded laterally along each side of the tail

Bruce Stinchcomb has a figure (3-26) in his book Worlds Oldest Fossils

Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur known from the Hell Creek Formation of Montana

The Messel quarry offers a nearly complete glimpse of the ancient Messel environment and the animals

Albertosaurus, maxilla Troodon They are cast in veryAlbertosaurus was a large, meat eating dinosaur from the late Cretaceous period about 68 to 65 million years ago. It was a theropod related to T. rex but smaller in size. Albertosaurus was about 8. 6 m long and weighed about 2500 kg. This replica is cast from a specimen found in Alberta, Canada. The original fossil is in the Royal Ontario Museum. Shipping Included