Figure 14 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 14 - Partial skull of Echinodon becklesii from the Lower Cretaceous Purbeck Formation of England. Left maxilla and portions of the lacrimal, jugal and ectopterygoid in medial view (NHMUK 48210). Stereopairs of bones (A), line drawing of bones (B), and stereopairs of teeth (C). Hatching indicates broken bone; dashed lines indicate estimated edges; grey tone indicate matrix; pink tone indicates wear facets. Scale bar equals 1 cm in A and 5 mm in B and C. Abbreviations: aec articular surface for the ectopterygoid aj articular surface for the jugal am articular surface for the maxilla am9 alveolus for maxillary tooth 9 ec ectopterygoid j jugal l lacrimal m maxilla m4 maxillary tooth 4 rc replacement crown.