Pachycephalosaurus, Dinosaur Poster T-Rex Their primitive traits are a

Their primitive traits are a heterocercal tail (meaning the upper lobe of the tail fin is larger than the lower with the end of the vertebral column prolonged and somewhat upturned in the upper lobe)

was created by the slow decomposition of dead vegetation in an anoxic environment combined with the fine grained sediments which accumulated at the bottom of these lakes

feeding along your garden path or peering over your neighbor's fence

Age: Late Cretaceous - Maastrichtian (about 65 MYA)

narrow section along the upper left side of the Lepidodendron trunk

Pachycephalosaurus, Dinosaur Poster T-Rex Their primitive traits are aDigitally Created Poster on 100 pound coated paper 18x24 inches. Pachycephalosaurus was a dome headed dinosaur. Its huge head housed an incredibly thick skull, a tiny brain, and large eyes. Its rounded skull was up to 10 inches thick. Pachycephalosaurus grew to be about 15 feet long and may have weighed roughly 950 pounds. Pachycephalosaurus probably had a good sense of smell. It had bumpy knobs on its snout and along the rear of its skull. This plant