Overview of ceratopsid teeth.

<p>A, isolated right maxillary tooth (TMP 1993.036.0407) in lingual (left) and mesial (right) views; B, isolated left dentary tooth (TMP 2002.012.0054) in labial (left) and distal (right) views; C, isolated right dentary tooth (AMNH 21606) in occlusal view. Arrow denotes tooth apex. Dashed line indicates boundary between mantle dentine (external) and orthodentine (internal); D, left dentary tooth row of <i>Centrosaurus apertus</i> (ROM 767) in labial view, showing the first 20 teeth (numbered); E, RD 17 microwear of the centrosaurine <i>Ce. apertus</i> (ROM 767); F, LD 22 microwear of the chasmosaurine <i>Chasmosaurus</i> sp. (ROM 839).