Table 2. Premaxillary posterior process angle across a range of ornithischians.

Taxon	Premaxilla posterior process angle, relative to horizontal (°)
Camptosaurus dispar	40
Gastonia burgei	60
Hesperosaurus mjosi	40
Heterodontosaurus tucki	40
Huayangosaurus taibaii	30
Hypsilophodon foxii	75
Jinzhousaurus yangi	60
Paranthodon africanus	47
Scelidosaurus harrisonii	60
Stegosaurus stenops	16
Tenontosaurus tilletii	50