Figure 4 | Scientific Reports

Figure 4

From: Evolution and Function of Dinosaur Teeth at Ultramicrostructural Level Revealed Using Synchrotron Transmission X-ray Microscopy

Figure 4

Internal tooth microstructures of various dinosaur genera within a comparative phylogenetic framework: (A) Extant Caiman Crocodilus, (B) Phytosaur (ROM 7981), (C) Yunnanosaurus, (D) Diplodocus, (E) Dilophosaurus, (F) Spinosaurus, (G) Carcharodontosaurus, (H) Dromaeosaurus, (I) Tarbosaurus, (J) Tyrannosaurus, (K) Edmontosaurus, (L) Shantungosaurus, (M) Saurolophus, (N) Pachycephalosaurus and (O) Triceratops.

Asterisks indicate enamel cracks. Black and white arrows indicate enamel tufts (ET) and the periodic features of a long enamel spindle (LES), respectively. Here, IGS: interglobular porous space structure; ES: enamel spindle; and ROM: Royal Ontario Museum. Mantle dentin and dentin are colored translucent green and yellow, respectively. Enamel is uncolored. (The small black dots in (A–O) are gold particles, which were used for system and image positioning.)

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