Etymology: Zuul from Zuul the Gatekeeper of Gozer, a fictional monster from the 1984 film Ghostbusters, crus Latin for shin or shank, and vastator Latin for destroyer, in reference to the sledgehammer-like tail club.

Zuul crurivastator is an ankylosaurine dinosaur from the upper Judith River Formation. It lived during the Late Cretaceous, so it had possible interactions with North American predators of that time such as Tyrannosaurus, Troodon, and Deinodon. It also may have interacted with the Diabloceratops, so it would be reasonable to show them sharing an ecosystem in the game. This new species of ankylosaurine is one of the best-preserved dinosaur skeletons found in North America to date.

The holotype specimen, discovered by Victoria Arbour and David Evans, notably has a complete skull and tail club (pictures below).

The left image is the specimen in situ and the right image is the holotype Zuul crurivastator skull. Note: for some reason this image is coming out blurrier here than they are in my google doc draft of the brief.

Holotype of Zuul crurivastator skull in (a) left lateral, (b) anterior, (c) posterior, and (d) oblique left anterodorsal views. (a′–d′) are digital models of the skull (Arbour and Evans 2017)