Fig. 6 in A new tyrannosaurine (Theropoda:Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids

Fig. 6. Comparison of right jugal (lateral view) and jugal sinus in tyrannosaurids. A) Thanatotheristes holotype (TMP 2010.5.7). B) Daspletosaurus torosus (TMP 2001.36.1). Black line represents position of transverse CT slice in the top right. Note the elliptical shape and extensive sinus inflation in the suborbital region cross section of Thanatotheristes, constrasting with the tear-drop shaped and constricted sinus of Daspletosaurus. Abbreviation: jse, jugal sinus endocast. Scale bars equal 3 cm.