Figure 16 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 16 - Dentary of Echinodon becklesii from the Lower Cretaceous Purbeck Formation of England. Line drawings of left dentary in lateral (A), medial (B), and dorsal (C) views (NHMUK 48215b). Hatching indicates broken bone; dashed lines indicate estimated edges; tone indicates matrix. Scale bar equals 1 cm. Abbreviations: ad1, 2, 10 alveolus for dentary tooth 1, 2, 10 adf anterior dentary foramen apd articular surface for the predentary be buccal emargination d4, 9 dentary tooth 4, 9 io impressed ornamentation Mc Meckel's canal ssymf subsymphyseal flange sym symphysis symt symphyseal trough.