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Euoplocephalus tutus and the Diversity of Ankylosaurid Dinosaurs in the Late Cretaceous of Alberta, Canada, and Montana, USA

Figure 9

Dorsosacral, sacral, caudosacral, and caudal vertebrae.

Partial sacrum of ROM 1930 in A) left lateral and B) dorsal (with anterior to the right) views. Sacrocaudal of AMNH 5245 in C) anterior, D) posterior, E) left lateral, and F) dorsal views. Sacrocaudal of ROM 1930 in G) anterior and H) posterior views. Sacrocaudal of ROM 1930 in I) anterior and J) posterior views; distal end of transverse process is partially reconstructed. Anterior free caudal vertebra of CMN 8530 (holotype of Anodontosaurus lambei) in K) anterior and L) right lateral views. M) Block of articulated anterior free caudal vertebrae of ROM 1930, in right lateral view. Penultimate free caudal vertebra of ROM 1930 in N) right lateral and O) anterior views. Transitional caudal vertebra (last free caudal vertebra before first handle vertebra of the tail club) of ROM 1930 in P) right lateral and Q) anterior views. AMNH 5404 free caudal vertebra in R) dorsal and S) right lateral views. Next most posterior AMNH 5404 free caudal vertebra in T) right lateral and U) anterior views. Scale equals 10 cm. Abbreviations: c, centrum; hs, haemal spine; nc, neural canal; np, notochordal prominence; ns, neural spine; poz, postzygapophysis; prz, prezygapophysis; prz-h, prezygapophysis of the first handle vertebra; r, rib; tp, transverse process.

Figure 9