I want (a cast) of it! Allosaurus fragilis original material on display at the Dinosaur National Monument in Jensen, Utah. This is one robust #Allosaurus! Wait til the back half of the video to see one of the key features, that pair of long rails in front of the lacrimal horns that reach almost to the snout. In A. fragilis they don’t run as far, nor are they as well developed. We see these ridges on ancient beasts like this one and on younger ones, too, so they aren’t tied to ontogeny. The jugal