Seen at the Denver Museum of Nature and Science, it’s one of the great match-ups of the dinosaur age:
Allosaurus and Stegosaurus both lived in the Late Jurassic period, about 155 to 150 million years ago, in what is now western North America (although a few specimens of both have been found in Portugal as well).
Allosaurus looks somewhat like a smaller, lighter Tyrannosaurus rex — although they’re only distantly related, and separated in time by nearly 90 million years. Of the two, we have more conclusive evidence for the ecological role of Allosaurus. A fossilized Stegosaurus neck plate was found with a U-shaped bite mark, matching the size and shape of an Allosaurus snout. Meanwhile, an Allosaurus tail vertebra was found with a partially-healed puncture wound that matches a Stegosaurus tail spike.