EOTRACHODON
a plant-eating hadrosaurid (duck-billed) dinosaur from the Late Cretaceous of North America.
Pronunciation: ee-oh-TRAK-oh-don
Meaning: Dawn
Trachodon
Author/s: Prieto-Márquez,
et al. (
2016)
Synonyms: None known
First Discovery: Alabama, USA
Discovery Chart Position: #917
Eotrachodon orientalis
(Dawn Trachodon from the east)Etymology
Eotrachodon is derived from the Greek "eos" (dawn), "trakhys" (rough) and "dont" (tooth), and pays homage to
Trachodon (the original rough tooth) which, in 1856, became the first duck-billed dinosaur to be named.
Eotrachodon is older though, hence the name.
The
species epithet,
orientalis,
means "from the east".
ZooBank registry:
urn:lsid:zoobank.org:act:C3B524BE-F8C5-49A1-982F-1FDE1FC7A43B.
Discovery
The remains of
Eotrachodon were discovered at locality AMg-1 in the Mooreville Chalk Formation, Montgomery, Montgomery County, Alabama, USA, by Dr. Jan Novak in 2007.
The
holotype (MSC 7949) is a partial skeleton and nearly complete skull.
Study of a cross section of shinbone revealed that this individual was actively growing at the time of death and may have grown much bigger.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Santonian
Age range: 86-84 mya
Stats:
Est. max. length: 7 meters
Est. max. hip height: 2 meters
Est. max. weight: 1.2 tons
Diet: Herbivore
References
• Prieto-Márquez A., Erickson GM and Ebersole JA (2016) "A primitive hadrosaurid from southeastern North America and the origin and early evolution of 'duck-billed' dinosaurs".
Journal of Vertebrate Paleontology. e1054495(3). DOI: 10.1080/02724634.2015.1054495
• Prieto-Márquez A, Erickson GM and Ebersole JA (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
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To cite this page:
Atkinson, L.
"
EOTRACHODON :: from DinoChecker's dinosaur archive".
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http://www.dinochecker.com/dinosaurs/EOTRACHODON›. Web access: 07th Mar 2026.
