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Cionodon

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Extinct genus of dinosaurs

Cionodon
Temporal range: Late Cretaceous, 70–66 Ma PreꞒ O S D C P T J K Pg N
Vertebra of C. arctatus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Neornithischia
Clade: Ornithopoda
Family: Hadrosauridae
Genus: Cionodon
Cope, 1874
Type species
Cionodon arctatus
Cope, 1874
Species
  • C. arctatus Cope, 1874 (nomen dubium)
  • C. stenopsis Cope, 1875 (nomen dubium)
Synonyms
  • Cinodon (sic)

Cionodon (meaning 'column tooth') is a dubious genus of hadrosaurid dinosaur from the Late Cretaceous. The type species, C. arctatus, was found in the Denver Formation of Lodge Pole Creek, Colorado and was formally described by Edward Drinker Cope in 1874 based on the holotype AMNH 3951, collected in 1873. It is a nomen dubium because it is based on very fragmentary remains. Two other species have since been described: Cionodon kysylkumensis (Riabinin, 1931), based on the holotype CCMGE 1/3760 (a set of vertebrae) from Uzbekistan, and Cionodon stenopsis (Cope, 1875), discovered in rocks from the Judith River Formation of Alberta, Canada in 1874. Although both are probably hadrosaurs, they are known only from fragmentary remains and Cionodon kysylkumensis has since been reclassified as Bactrosaurus kysylkumensis.

See also

References

  1. ^ J. R. Horner, D. B. Weishampel, and C. A. Forster. 2004. Hadrosauridae. In D. B. Weishampel, H. Osmolska, and P. Dodson (eds.), The Dinosauria (2nd edition). University of California Press, Berkeley 438-463
  2. E. D. Cope. 1874. Report on the stratigraphy and Pliocene vertebrate paleontology of northern Colorado. Bulletin of the United States Geological and Geographical Survey of the Territories 1(1):9-22
  3. ^ A. N. Riabinin. 1931. Ostatki dinozavrov iz verkhnego mela nizov'ev r. Amu-Dar'i . Zapiski Rossiyskogo Mineralogicheskogo Obshchestva 60(1):114-118
  4. E. D. Cope. 1875. On the transition beds of the Saskatchewan district. Proceedings of the Academy of Natural Sciences of Philadelphia 27:2-3
Ornithopoda
Avemetatarsalia
Ornithischia
Ornithopoda
    • see below↓
Ornithopoda
Ornithopoda
Hypsilophodontidae?
Elasmaria
Rhabdodontomorpha
Tenontosauridae?
Rhabdodontidae
Dryomorpha
Dryosauridae
Ankylopollexia
Hadrosauriformes
Iguanodontidae
Hadrosauroidea
    • see below↓
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Hadrosauroidea
Hadrosauroidea
Hadrosauridae
Lambeosaurinae
Parasaurolophini
Lambeosaurini
Saurolophinae
Brachylophosaurini
Austrokritosauria
Kritosaurini
Saurolophini
Edmontosaurini
Qianjiangsaurus changshengi

Tlatolophus galorum Lambeosaurus lambei Gryposaurus? alsatei

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Related articles
Ichnotaxa
Ootaxa
Nomina dubia
Other articles
Taxon identifiers
Cionodon


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