Fig. 8 in A new tyrannosaurine (Theropoda:Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids

Fig. 8. Comparison of left frontal in dorsal view in tyrannosaurids.A) Thanatotheristes TMP 2010.5.7. White dash line represents nondiagnostic postorbital fragment attached to the frontal. B) Subcutaneous surface of frontal of Daspletosaurus torosus TMP 2001.036.0001. Abbreviations: apc, anterior postorbital contact expansion; aesc, autapomorphic anterior extension of sagittal crest; ifs, interfrontal suture; ls, lacrimal socket; np, nasal process; os, orbital slot; PA, parietal; PF, prefrontal; pfl, prefrontolacrimal process; pfn, prefrontonasal process; po, postorbital fragment; sc, sagittal crest; stf, supratemporal fossa; str, supratemporal ridge. Scale bars equal 5 cm.