Illustration board

Master RGB File:
5,349 pixels (17.8") high
3,140 pixels (10.4") wide
300 dpi resolution
48.1 Mb uncompressed

Image Use

Publication History


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.

Vital Statistics

Genus Name: Stygimoloch (River "Styx" and Semitic
  god, "Moloch")
Type Species: * S. spinifer (Galton & Sues, 1983)
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)

All images are protected by copyright. Permission to reproduce any image must be obtained by writing to: Please see our Image Use page for more information.