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Incremental lines in the dentine of representatives from various dinosaur clades. The incremental lines of von Ebner run from left to right in each plate and are the smallest visible laminations. The teeth were thin sectioned longitudinally and viewed with polarized microscopy. (A) Tyrannosaurus (Tyrannosauridae); (B) Triceratops (Ceratopsidae); (C) Edmontosaurus (Hadrosauridae); (D) Edmontonia (Nodosauridae). The spacing interval of the incremental lines is approximately 15 μm.
