Stygimoloch (Styx River Devil) is a dubious genus of pachycephalosaurid dinosaur that originated from Late Cretaceous North America. It has long been debated whether or not the genus represents or a distinct genus, or simply a growth stage of the larger Pachycephalosaurus. Stygimoloch was a plant-eating dinosaur that had bony spikes and knobs on its skull. This bipedal dinosaur lived about 68 million to 65 million years ago. Like other pachycephalosaurids, Stygimoloch was a Bipedal…
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