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Cedrorestes

Say it: SEED-roh-RES-teez

Name means: “cedar mountain dweller”1

Ate: PlantsBeaked plant-eatersEarly Cretaceous

Cedrorestes was a big plant-eating dinosaur that lived in what is now Utah, USA, about 137 to 132 million years ago. It could walk on two legs or on all fours, and it had a beak for munching plants.1 4

Lived

137 to 133 million years ago4

Early Cretaceous

Fossils found in

east-central Utah, USA, in the Cedar Mountain Formation1 4

Food

Plants1 2

Length

6 m3

Weight

1.5 tonnes3

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 1 cars

as long as 6 dogs nose to tailas long as 33 bananas end to endas heavy as 50 big dogsas heavy as 300 watermelons

How big was Cedrorestes compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

cool stuff

Fun facts

Cedrorestes is known from only one partial skeleton, including hip bones, a thighbone, and ribs.1

Its hip bone had a tall blade like Iguanodon but also a special bony bump that is usually seen in hadrosaurids, the duck-billed dinosaurs.1

The fossil was found scattered in mudstone and showed damage from weathering or trampling before it was buried.1

Cedrorestes lived alongside other dinosaurs like the armored Gastonia, the big predator Utahraptor, and the sauropod Cedarosaurus.1

The species name crichtoni honors Michael Crichton, the author of Jurassic Park.1

Scientists think Cedrorestes could move on two legs or on all fours, like many other iguanodontian dinosaurs.1

AI-made picture of Cedrorestes — An AI-made picture of how Cedrorestes 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 Cedrorestes

?How big was Cedrorestes?

No one knows for sure because only a partial skeleton has been found. It was a large herbivore, but scientists need more fossils to estimate its size.1

?What did Cedrorestes eat?

It was a plant-eater. It had a beak for munching plants and could walk on two legs or on all fours to reach different kinds of vegetation.1

?Was Cedrorestes a dinosaur?

Yes, it was a dinosaur. It belonged to the group Iguanodontia, which are plant-eating ornithischian dinosaurs.1

?When did Cedrorestes live?

It lived during the Early Cretaceous Period, about 137 to 132 million years ago, in what is now Utah, USA.1

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For dino experts

Scientific name: Cedrorestes
Named by: Gilpin et al. 20074
Group: Beaked plant-eaters
Family / clade: Hadrosauroidea4
Classification: Ornithischia > Ornithopoda > Iguanodontia4
Age of the rocks: 137 to 133 million years (Valanginian)4
Rock formations: Cedar Mountain4
Countries: USA4
Fossil records: 1 in the Paleobiology Database4
Discovery: The fossil was found in 2001 near the top of the Yellow Cat Member in Utah. David Gilpin and colleagues named it Cedrorestes crichtoni in 2007.1
Still debated: Scientists are not sure whether Cedrorestes was an early hadrosaurid or a close relative of hadrosaurids, because the skeleton is incomplete.1

Where the facts come from

Cedrorestes (en.wikipedia.org)
Cedrorestes Gilpin et al. 2007 - Encyclopedia of Life (eol.org)
Cedrorestes crichtoni (es.wikipedia.org)
Cedrorestes 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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