Pachycephalosaurus Bone Fossil | Hell Creek Formation | South Dakota

Pachycephalosaurus sp.Cretaceous (68 - 66 million years ago)Private Ranch, Hell Creek Formation, South DakotaAssorted sizes available   Receive ONE, random hand selected piece, each one is hand selected for quality and each piece is unique. Comes in a 3.5" x 3.5" floating case. Picture is representative of what you may receive, however actual piece varies. The name Pachycephalosaurus translates to "thick-headed lizard." This bipedal herbivore was known for its remarkably thick skull roof. It had long hind limbs and relatively small forelimbs. One of its most distinctive features was the large, dome-shaped structure atop its skull, which could be up to 25 cm (10 in) thick, providing protection for its small brain. The back of the dome featured bony knobs, and short, blunt spikes extended upward from the snout. These spikes were not sharp but likely played a role in display or interactions with other individuals. The dome itself was composed of a special type of bone called fibrolamellar