Figure 4. Squamosals from select S in Ontogeny and variation of the pachycephalosaurine dinosaur Sphaerotholus buchholtzae, and its systematics within the genus

Figure 4. Squamosals from select S. buchholtzae specimens highlighting some of the observed patterns of variation and the ontogenetic development. A–C, TMP 1987.113.0003 in posterior (A), left posterolateral oblique (B) and left lateral (C) views. D–F, ROM 75835 in posterior (A), dorso- left posterolateral (B) and left posterolateral (C) views. G–I, ROM in dorsal oblique (A), posterior ventral (B) and right lateral oblique (C) views. J–L, ROM 53582 in dorsal oblique (A), posterior ventral (B), and right lateral oblique (C) views. Specimens not to scale. Scale bars = 1 cm.