Deinodon horridus w/ Nypa sp. palm

Well, probably. As far as we know, there are two types of tyrannosaur present in the Judith River/Dinosaur Park Formation, currently going under four names. Two names are based on teeth alone: Deinodon horridus and Aublysodon mirandus. A. mirandus teeth are incisors from a juvenile tyrannosaur, and they match most (but not all) characteristics from a subadult specimen referred to Daspletosaurus torosus, a slightly older species from the Oldman Formation (interestingly, A. mirandus teeth also have some but not all features present in teeth of the later Tyrannosaurus rex, making it possible that it's an intermediate species between the two). Skeletal material has been referred to Daspletosaurus sp. from the Dinosaur Park, but doesn't really need a new specific name--A. mirandus is available and probably the same species.

Deinodon horridus is a bit more problematic, since there is a named tyrannosaur from the Dinosaur Park known from good skeletal material--Gorgosaurus libratus. Most authors have conceded that these two are almost certainly synonymous, though the presence of Daspletosaurus sp./Aublysodon mirandus makes this tricky. Some authors have also referred A. mirandus to D. horridus as a junior synonym, but as one is based on juvenile teeth that seem to have more in common with tyrannosaurines than with albertosaurines, this seems unlikely. As far as I know, no work has been done to tell whether or not tyrannosaurine and albertosaurine adult lateral teeth can be differentiated or not. Until then it remains possible that Aublysodon mirandus is the juvenile form of Deinodon horridus, and that both are tyrannosaurines. However, since most modern sources seem to make Deinodon a potential synonym of Gorgoaurus and Aublysodon of Daspletosaurus, I've followed that here.

Long story short, this is a drawing of Gorgosaurus libratus that I labelled Deinodon horridus because I fancy an avant garde approach to the art of nomenclature. I drove this home by depicting it in a very old-school way and in a tripodal stance because, why not? All the work since the 1970s shows that theropods probably walked with the vertical column near-horizontal, but the key word there is "walked." This big displaying male is standing still. So there!

Based primarily on a skeletal (I believe representing the holotype) by Tracy Ford.