Fig. 1 in Tyrannosaur Paleobiology: New Research on Ancient Exemplar Organisms

Fig. 1. The anatomy of tyrannosaurs, showing the variety of skeletal and cranial morphology in the group. (A) A skeletal reconstruction of Alioramus, a gracile and long-snouted tyrannosaurid, which exhibits many features of the generalized tyrannosaurid body plan (large skull, small arms, long hindlimbs, long tail). (B to D) skulls of the basal tyrannosauroids Guanlong (B), Dilong (C), and Bistahieversor (D). (E and F) skulls of juvenile (E) and adult (F) Tyrannosaurus scaled to the same length, illustrating the transition from a longer to a deeper skull during ontogeny. All scale bars equal 10 cm. Credits: F. Ippolito, American Museum of Natural History (AMNH) (A); I. Block, National Geographic stock (B); M. Ellison, AMNH (C); D. Baccadutre, New Mexico Museum of Natural History and science (D); s. Williams, Burpee Museum of Natural History (E); AMNH Photo Archives (#2752, Tyrannosaurus skull as mounted in the old hall) (F).