Comparison of outline drawings of ankylosaur ulnae.

A, Chuanqilong chaoyangensis, left ulna in medial view; B, Liaoningosaurus paradoxus (IVPP V12560), left ulna in medial view; C, Peloroplites cedrimontanus (CEUM 11347), right ulna in lateral view, from [44]; D, Hungarosaurus tormai (MTM 2007.25.2), right ulna in lateral view, from [55]; E, Niobrosaurus coleii (MU 650 VP), right ulna in lateral view, from [65]; F, Minmi sp. (QMF 18101), left ulna in medial view, from [24]; G, Cedarpelta bilbeyhallorum (CEUM 10256), left ulna in medial view, from [44]; H, Euoplocephalus tutus (AMNH 5406), right ulna in medial view, from [31]; I, Pinacosaurus (MPC 100/1323), left ulna in lateral view, from [46]. Scale bars in A, C–H equal10 cm; scale bar in B equals 1 cm; scale bar in I equals 5 cm. [planned for page width].