Eotrachodon

Eotrachodon Temporal range: Late Cretaceous, 83.6–80 Ma PreЄ Є O S D C P T J K Pg N ↓
Right maxilla
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Order:	†Ornithischia
Suborder:	†Ornithopoda
Family:	†Hadrosauridae
Genus:	†Eotrachodon Prieto-Marquez, Erickson and Ebersole, 2016[1]
Type species
†Eotrachodon orientalis Prieto-Marquez, Erickson and Ebersole, 2016[1]

Eotrachodon orientalis is a species of hadrosaurid that was described in 2016. The holotype was found in the Mooreville Chalk Formation in Alabama in 2007, sharing the same habitat with Lophorhothon which was another primitive hadrosaur known from skull fragments, with an exceptionally well-preserved skull, making it a rare find among dinosaurs of Appalachia. A phylogenetic study has found Eotrachodon to be the sister taxon to the hadrosaurid subfamilies Lambeosaurinae and Saurolophinae. This along with the other Appalachian hadrosaur Hadrosaurus and possibly Lophorhothon, Claosaurus and both species of Hypsibema, suggests that Appalachia was the ancestral area of Hadrosauridae.^[1]

†Hadrosauridae	†Hadrosaurus foulkii †Eotrachodon orientalis †Saurolophidae (=Euhadrosauria) †Lambeosaurinae †Saurolophinae

References

1. Prieto-Marquez, Albert; Erickson, Gregory M.; Ebersole, Jun A. (2016). "A primitive hadrosaurid from southeastern North America and the origin and early evolution of 'duck-billed' dinosaurs". Journal of Vertebrate Paleontology 36 (2): e1054495. doi:10.1080/02724634.2015.1054495.

Further reading

• Prieto-Márquez, Albert; Erickson, Gregory M.; Ebersole, Jun A. (14 April 2016). "Anatomy and osteohistology of the basal hadrosaurid dinosaur Eotrachodon from the uppermost Santonian (Cretaceous) of southern Appalachia". PeerJ 4: e1872. doi:10.7717/peerj.1872.