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Stygimoloch was a small pachycephalosaur whose thick skull bristled with bony knobs and spikes. It may have engaged in head-butting, either for defense or to establish a pecking order during mating. Its name derives from the river Styx ("stygi") and the name of a Semitic god, Moloch. In Greek mythology, the Styx was a mythical river flowing through the underworld near Hades (Hell). Stygimoloch's remains were discovered in the Hell Creek formation of Montana and Wyoming. According to myth, children were fed to the god Moloch. However, even if there had been any youngsters around in the Cretaceous, they would have been in no danger of being eaten by Stygimoloch; it was a vegetarian.
Length: 6-9 feet (2-3 meters)
Weight: 150-220 pounds
Time: 74-65 million years ago (Late Cretaceous)
Place: Montana, Wyoming
Diet: plant-eater (herbivore)
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