Figure 91 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 91 - Premaxillary dentition in Heterodontosaurus tucki. Cast of premaxillary tooth 2 and 3 in left lateral view (UCRC PVC11) from an early mold of adult skull SAM-PK-K1332. Stereopair (A) and line drawing (B) showing spalling, abrasion, and the mesial and distal edges of ligual tooth-to-bill wear facets. Scale bar equals 5 mm. Abbreviations: aa apical abrasion bsae breakage surface with abraded edges elwf edge of lingual wear facet sfs spalled fracture surface safs spalled abraded fracture surface.