Eotrachodon

Eotrachodon orientalis (meaning "dawn Trachodon from the east") is a species of hadrosaurid that was described in 2016. The holotype was found in the Mooreville Chalk Formation (Upper Santonian) in Alabama in 2007 and includes a well-preserved skull and partial skeleton, making it a rare find among dinosaurs of Appalachia. Another primitive hadrosaur, Lophorhothon, is also known from the same formation, although Eotrachodon lived a few million years prior. 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]

Life restoration of Eotrachodon orientalis

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

Eotrachodon Temporal range: Late Cretaceous, 86–83.6 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Right premaxilla
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Clade:	†Ornithischia
Clade:	†Ornithopoda
Family:	†Hadrosauridae
Genus:	†Eotrachodon Prieto-Márquez, Erickson and Ebersole, 2016[1]
Type species
†Eotrachodon orientalis Prieto-Marquez, Erickson and Ebersole, 2016[1]

See also

• Timeline of hadrosaur research
• 2016 in paleontology