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meaning: "column tooth"
Named By: Edward Drinker Cope in 1874
Time Period: Late Cretaceous, 66 Ma
Location: Canada, Alberta - Frenchman Formation. USA, Colorado - Laramie Formation
Size: Uncertain due to lack of remains
Diet: Herbivore
Fossil(s): Fragmentary remains
Classification: | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Hadrosauridae |

Cionodon (meaning 'column tooth') was a genus of dinosaur from the Late Cretaceous Period (Maastrichtian stage). The type species, Cionodon arctatus lived in what is now Colorado. It is classified as a hadrosaur, and was formally described by Edward Drinker Cope in 1874. It is a nomen dubium because it is based on very fragmentary remains. Two other species were described: Cionodon kysylkumensis from central Asia, and Cionodon stenopsis from what is now western Canada. Both are probably hadrosaurs, but are also fragmentary. Cionodon kysylkumensis has since been reclassified as Bactrosaurus kysylkumensis.

Read more about Cionodon at Wikipedia
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