Dino card No. 0611 of 2,027

Eotrachodon

Say it: EE-oh-TRAK-oh-don

Name means: “dawn rough tooth”1

Ate: PlantsDuck-billsLate Cretaceous

Eotrachodon was an early duck-billed dinosaur that lived in what is now Alabama, USA. It had a long snout and hundreds of teeth for chewing plants. This dinosaur helps scientists understand how duck-billed dinosaurs evolved.2

Lived

86 to 84 million years ago4

Late Cretaceous

Fossils found in

Montgomery, Alabama, USA4 2

Food

Plants4

Length

4 to 5.1 m2

estimated body length of holotype specimen

Weight

640 kg3

estimated weight of largest known specimen

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

How heavy was it?

as heavy as 21 big dogs

as long as 5 dogs nose to tailas long as 28 bananas end to endas heavy as 130 watermelons

How big was Eotrachodon compared to YOU?

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cool stuff

Fun facts

Eotrachodon is the oldest known duck-billed dinosaur from eastern North America.2

Its name means 'dawn rough tooth' because it was an early hadrosaur with rough teeth.1

The only fossil found was a young animal that was still growing when it died.2

Eotrachodon lived about 83 to 84 million years ago during the Santonian stage.2

Its skull had a special three-part depression around the nostril, which is a unique feature.2

This dinosaur was found in marine rocks, meaning its body was washed into the sea after death.2

AI-made picture of Eotrachodon — An AI-made picture of how Eotrachodon might have looked, made by a computer from what scientists know. It is a guess: the real animal may have looked different, and nobody knows its true colours.

you asked

Most asked questions about Eotrachodon

?How big was Eotrachodon?

About 4 to 5.1 metres (13 to 17 feet) long. This is based on the only known fossil, which was a young animal that was still growing.2

?What did Eotrachodon eat?

It ate plants. It had a long snout and hundreds of teeth for chewing tough plant material.1 2

?When did Eotrachodon live?

It lived about 83 to 84 million years ago during the Late Cretaceous period.1 2

?Where was Eotrachodon found?

It was found in Alabama, USA, in a marine rock layer called the Mooreville Chalk Formation. Its body was washed into the sea after death.1 2

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For dino experts

Scientific name: Eotrachodon
Named by: Prieto-Márquez et al. 20164
Group: Duck-bills
Family / clade: Hadrosauridae4
Classification: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae4
Age of the rocks: 86 to 84 million years (Santonian)4
Rock formations: Mooreville Chalk4
Countries: USA4
Fossil records: 1 in the Paleobiology Database4
Discovery: Eotrachodon was named in 2016 by Albert Prieto-Márquez, Gregory Erickson, and James Ebersole. The fossil was found in Montgomery, Alabama, in the Mooreville Chalk formation.4 2
Still debated: Scientists are not sure how big Eotrachodon grew because the only known fossil is from a juvenile.2

Where the facts come from

Eotrachodon (en.wikipedia.org)
Anatomy and osteohistology of the basal hadrosaurid ... - PMC (pmc.ncbi.nlm.nih.gov)
Eotrachodon orientalis | Dinosaur Database by DinoAnimals.com (dinoanimals.com)
Eotrachodon in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

Every fact on this page has a number that points to its source. If we got something wrong, sorry, we are dino fans, not a science journal. Tell us at [email protected] and we will fix it.

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