Figure 17 in Scelidosaurus harrisonii (Dinosauria: Ornithischia) from the Early Jurassic of Dorset, England: biology and phylogenetic relationships

Figure 17. Scelidosaurus. Occlusal views of maxillary and dentary dentitions. A, separated dentitions. B, alignment of dentitions during occlusion – the bowing of each dentition match to permit orthal pulping or intermittent tooth-tooth occlusion. C, malocclusion modelled by the propalinal displacement of the dentary, creating a zone where the dentitions cross over (starred). D, two modes of jaw closure: Di, represents the non-occlusal orthal pulping of vegetation; Dii shows high-angle occlusion between opposing crowns that creates shear to cut vegetable fibres and generates steep wear facets on adjacent crown surfaces. Both modes of occlusion occur at intervals along the dentitions. Abbreviations: Dent, dentary dentition; Max, maxillary dentition; Malocc, malocclusion created by propalinal displacement of the dentary; Occ, normal occlusal relationship of the dentitions. Arrows indicate direction of movement. Starred symbol indicates region where dentitions cross, creating the potential for damage to the teeth caught in opposition.