Figure 37. A in The Lower Jurassic ornithischian dinosaur Heterodontosaurus tucki Crompton & Charig, 1962: cranial anatomy, functional morphology, taxonomy, and relationships

Figure 37. A, Geranosaurus atavus Broom, 1911. SAM- PK-1871 (holotype). Upper image: dorsal view of the fragmentary (and subsequently damaged) remains of the anterior part of the dentaries and predentary; lower image, the extremely fragmentary right maxilla (with traces of the premaxilla), showing the broken crowns and roots of cheek teeth of a heterodontosaurid from Eastern Cape Province. Matrix on dentary block signified using irregular tone. B, Lycorhinus angustidens Haughton, 1924. SAM-PK-3606 (holotype). Partial left dentary, based on the original illustration by Haughton (re-drawn by Hopson, 1975: fig. 1a). The specimen can no longer be found (apart from the dentary crown) and is now represented only by a moulded impression of the original. C, L. angustidens Haughton, 1924. Lateral view of the left dentary dentition (from Hopson, 1975: fig. 1B) retrieved from an impression of the dentition left on the sandstone matrix preserved with the original specimen.