Nanotyrannus lancensis (Gilmore, 1946)

Neal L. Larson, 2008, One Hundred Years of Tyrannosaurus rex: The Skeletons, Tyrannosaurus rex, the tyrant king, Bloomington: lndiana University Press, pp. 1-55 : 2

Although some authors have considered Nanotyrannus lancensis ( Bakker et al. 1988)

synonymous with T. rex ( Carr 1999; Carr and Williamson 2004; Holtz 2004; Glut 1997, 2000, 2003, 2006), others ( Bakker et al. 1988; Currie 2003; Larson this volume) do not agree. Tooth count, bone shape, and foramen placement and size, along with many other skeletal differences, seem to clearly separate the 2 genera. Because there is so much evidence separating Nanotyrannus from T. rex , I have excluded Nanotyrannus from the following list of T. rex specimens.