Eotrachodon

Say it like this: “ee-oh-TRAK-oh-don”

Eotrachodon orientalis

Eotrachodon ate plants and walked on two or four legs. It lived in the Late Cretaceous. Bones have been found in the United States.

Quiz me on Eotrachodon

When: Late Cretaceous (Santonian) · roughly 85.7 to 83.6 million years ago
Named in: 2016 · Prieto-Márquez, A.; Erickson, G. M.; Ebersole, J. A.
Hip height: 1.6 m · 5 ft
Length: 4.9 m · 16 ft
Weight: 640 kg · 1,411 lb
Found in: the United States · Mooreville Chalk
Food and walking: Herbivore · Two or four legs
Kind: beaked plant-eater · Ornithopod
Family branch: Hadrosauridae

The story in short

Eotrachodon was formally named in 2016 by A. Prieto-Márquez and colleagues.

Fossils referred to Eotrachodon date to the Late Cretaceous (Santonian), roughly 85.7 to 83.6 million years ago. Finds come from the United States, including the Mooreville Chalk Formation. It was a herbivore and could move on two or four legs.

Published estimates put Eotrachodon at a length near 4.9 m, hips about 1.6 m high, and a body mass around 640 kg.

On the family tree it sits in Hadrosauridae, among the ornithopod dinosaurs.

Close relatives

Aquilarhinus

Aquilarhinus palimentus

Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago

Arstanosaurus

Arstanosaurus akkurganensis

Late Cretaceous (Santonian · Campanian) · roughly 85.7 to 72.2 million years ago

Barsboldia

Barsboldia sicinskii

Late Cretaceous (Maastrichtian) · roughly 72.2 to 66 million years ago