Figure 2 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 2 - Early heterodontosaurid discoveries. A Lithographic drawing of the right and left premaxillae and the anterior portion of the left maxilla in lateral view of Echinodon becklesii (NHMUK 48209; from Owen 1861) B Drawing of lower jaws in dorsal view of Geranosaurus atavus (SAM-PK-K1871; from Broom 1911) C Photograph of the posterior portion of a subadult skull in right lateral view of Heterodontosaurus tucki (AMNH 24000). Scale bars equal 1 cm in A and 2 cm in B and C.