Eotrachodon

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Eotrachodon
Temporal range: Late Cretaceous, 86–83.6  Ma
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Eotrachodon maxilla.png
Right premaxilla
Scientific classification OOjs UI icon edit-ltr.svg
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]

Eotrachodon (meaning "dawn Trachodon ") is a genus of hadrosaurid dinosaur that lived in the Late Cretaceous of eastern North America. The holotype was found in the Mooreville Chalk Formation (Upper Santonian) of Alabama in 2007 and includes a well-preserved skull and partial skeleton, making it a rare find among dinosaurs of Appalachia. It was described nine years later as the new genus and species E. orientalis, with the specific name meaning "of the east". Another primitive hadrosauromorph, Lophorhothon , is also known from the same formation, although Eotrachodon lived a few million years prior. A phylogenetic study has found it to be the sister taxon to the hadrosaurid subfamilies Lambeosaurinae and Saurolophinae. This, along with the other Appalachian hadrosaurid Hadrosaurus and the more basal hadrosauroids Lophorhothon , Claosaurus , and Hypsibema (both species), suggests that Appalachia was the ancestral area of Hadrosauridae. [1]

Contents

Life restoration of Eotrachodon orientalis Eotrachodon NT small.jpg
Life restoration of Eotrachodon orientalis

Hadrosaurus foulkii

Eotrachodon orientalis

Saurolophidae (=Euhadrosauria)

See also

References

  1. 1 2 3 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. Bibcode:2016JVPal..36E4495P. doi:10.1080/02724634.2015.1054495. S2CID   86032549.

Further reading