“Baby” dinosaur fossils, US penny for sense of scale (19.05 mm diameter). A) hadrosaurid (Edmontosaurus) tooth; B ) leptoceratopsid (Leptoceratops) rooted tooth; C) troodontid (Pectinodon) tooth; D) dromaeosaurid (Dromaeosauridae) tooth; E) tyrannosaurid (Tyrannosaurus) premaxillary tooth; F) thescelosaurid (Thescelosaurus) premaxillary teeth.
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