Figure 10 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 10 - Cheek tooth terminology. A Postcaniniform maxillary or dentary tooth in labial or lingual view, respectively. B Postcaniniform maxillary or dentary tooth in distal view. C Pair of worn postcaniniform maxillary or dentary teeth in proximal or distal view showing low-angle (left) and high-angle (right) wear facets (red line). The angle of incidence (dashed line) of each wear facet (red line) is measured away from the vertical axis of the crown. Abbreviations: ad apical denticle cd cingular denticle cel cingular ectoloph ci cingulum dbd distal basal denticle dicf distal intercingular fossa dmri distal marginal ridge dpcf  distal paracingular fossa mbd mesial basal denticle mpcf mesial paracingular fossa ne neck pri primary ridge rt root sri secondary ridge wf wear facet.