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Cionodon (meaning 'column tooth') was a dubious 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.

Temporal range: Late Cretaceous, 66 Ma
Cionodon arctatus.jpg
Vertebra of C. arctatus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Suborder: Ornithopoda
Family: Hadrosauridae
Genus: Cionodon
Cope, 1874
Type species
Cionodon arctatus
Cope, 1874
  • Cionodon arctatus Cope, 1874 (nomen dubium)
  • Cionodon stenopsis Cope, 1875 (nomen dubium)

See alsoEdit