Figure 1
From: Developmental and evolutionary novelty in the serrated teeth of theropod dinosaurs
Microanatomy of ziphodont archosaur teeth with deep interdental folds.
(A) Skull of Gorgosaurus libratus, a tyrannosaurid dinosaur, drawn by Danielle Dufault. (B) Complete tooth (ROM 31535) and sagittal thin sections through distal and mesial carinae of a maxillary cf. Gorgosaurus sp. (ROM 57981) tooth. (C–H), carinae of ziphodont teeth under SEM (left) and in thin section (right). (C), Indeterminate phytosaur, ROM 7981, mesial carina. (D) Coelophysis bauri, CM 76863, distal carina. (E) Allosaurus fragilis, ROM 66106, distal carina. (F) Carcharodontosaurus saharicus, ROM 52017 (left) and ROM 47691 (right), mesial carina. (G) cf. Gorgosaurus libratus, ROM 57981, mesial carina. (H) Tyrannosaurus rex, ROM 66108, mesial carina. Abbreviations: dej, dentine-enamel junction; e, enamel; if, interdental fold; is, interdental sulcus; pd, primary dentine.
