Figure 95 from: Sereno P (2012) Taxonomy, morphology, masticatory function and phylogeny of heterodontosaurid dinosaurs. ZooKeys 226: 1-225. https://doi.org/10.3897/zookeys.226.2840

Figure 95 - Jaw musculature and keratin sheathing in Heterodontosaurus from the Lower Jurassic Upper Elliot and Clarens formations of South Africa. Reconstruction of select jaw muscles and keratin sheathing of upper and lower bills supported in this study. Pink tone indicates wear facets. Abbreviations: amep adductor mandibulae externus profundus ames adductor mandibulae externus superficialis amev adductor mandibulae externus ventralis dm depressor mandibulae.