Figure 106 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 106 - Evolution of key masticatory specializations among heterodontosaurids. A Heterodontosauridae B Simple-crowned heterodontosaurids C Heterodontosaurinae D Advanced heterodontosaurines E Abrictosaurus and Heterodontosaurus F Heterodontosaurus. Abbreviations: 1 arched inset diastema 2 heterodont dentition with caniniform teeth 3 cingular ectoloph 4 postcaniniform diastema 5 external mandibular fossa 6 lowered jaw articulation 7 mobile predentary articulating against saddle-shaped dentary articular surface 8 increased differential in crown size 9 arched alveolar margins in cheek dentition 10 asymmetrical enamel 11 hollow crown base.