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Hadrosaur-like teeth attributed to Trachodon, by Joseph Leidy 1860 |
Trachodon, Troodon and Deinodon
In 1855 Ferdinand V. Hayden conducted a geological survey along the Judith River in Nebraska (now Montana). He found a large number of fossilized teeth, which were referred to Joseph Leidy for identification. Leidy identified and named 8 genera of which 3 turned out to be dinosaurs -
These represent the first North American dinosaur discoveries
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Hadrosaur-like teeth attributed to Trachodon, by Joseph Leidy 1860 |
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1903 Restoration of Trachodon (Frederick Lucas) |
For further discoveries on Trachodon, see The Trachodon Mummy 1908.