Fig. 5

Although the skulls of Apatosaurus and Diplodocus are very similar (cf. Fig. 4), their postcranial skeletons differ considerably. Apatosaurus louisae (CM 3018 and CM 11162) in left lateral (a), dorsal (b), anterior (c, without cervicals), and posterior (d, without caudals). Diplodocus carnegie (CM 84 and CM 94) in left lateral (e), dorsal (f), anterior (g, without cervicals), and posterior (h, without caudals). Courtesy of Gregory S. Paul. Scale bars 1 m