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Plesiohadros

Q: What did Plesiohadros eat?

Plesiohadros was a plant-eating dinosaur, so it ate plants. It had a beak like a duck and lots of teeth for chewing tough plants.

Q: When did Plesiohadros live?

Plesiohadros lived during the Late Cretaceous period, between about 85.7 and 72.2 million years ago, during the Santonian and Campanian ages.

Q: Where was Plesiohadros found?

Plesiohadros was found in southern Mongolia, at a place called Alag Teg, in the Alagteeg Formation.

Q: How big was Plesiohadros?

Scientists do not know its exact size, but it was a large dinosaur, with an adult length estimated at about 8 metres, so quite big.

Say it: PLEE-see-oh-HAD-ros

Name means: “near to hadrosaurids”1

Ate: PlantsBeaked plant-eatersLate Cretaceous

Plesiohadros was a big, plant-eating dinosaur that walked on four legs but could probably run on two. It had a beak like a duck and lots of teeth for chewing tough plants. This dinosaur lived in what is now Mongolia during the Late Cretaceous period.1 2

Lived

86 to 72 million years ago3

Late Cretaceous

Fossils found in

Alag Teg locality, Alagteeg Formation, southern Mongolia1 2

Food

Plants2

Length

10 m2

PBDB lists adult length as 10 to < 100 (likely in decimeters, so about 1 to 10 meters); exact size unknown

When did it live?

Triassic

Jurassic

Cretaceous

252 million years ago20114566, the asteroid

How big was it?

How long was it?

as long as 2 cars parked in a rowas long as 56 bananas end to end

How big was Plesiohadros compared to YOU?

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

cool stuff

Fun facts

Plesiohadros is the only known hadrosaur from the Alagteeg Formation.1

It had a very long gap between its first tooth and its beak, about one-third the length of its tooth row.2

Its teeth had only one or two extra ridges, unlike many other hadrosaurs that had more.2

The bone above its eye socket flared out into a rough, wing-like rim, a feature not seen in other hadrosaurs.2

Plesiohadros lived between 85.7 and 72.2 million years ago, during the Santonian and Campanian ages.2

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

?What did Plesiohadros eat?

Plesiohadros was a plant-eating dinosaur, so it ate plants. It had a beak like a duck and lots of teeth for chewing tough plants.1 3

?When did Plesiohadros live?

Plesiohadros lived during the Late Cretaceous period, between about 85.7 and 72.2 million years ago, during the Santonian and Campanian ages.3

?Where was Plesiohadros found?

Plesiohadros was found in southern Mongolia, at a place called Alag Teg, in the Alagteeg Formation.1

?How big was Plesiohadros?

Scientists do not know its exact size, but it was a large dinosaur, with an adult length estimated at about 8 metres, so quite big.3

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Myth buster

Myth: Plesiohadros was a dinosaur that lived in the sea.

Truth: No, Plesiohadros was a land-dwelling dinosaur. Its name sounds like 'plesiosaur', but it was a beaked plant-eater that walked on land.1 2

For dino experts

Scientific name: Plesiohadros
Named by: Tsogtbaatar et al. 20143
Group: Beaked plant-eaters
Family / clade: Hadrosauroidea3
Classification: Ornithischia > Ornithopoda > Iguanodontia3
Age of the rocks: 86 to 72 million years (Santonian / Campanian)3
Rock formations: Alagteeg3
Countries: Mongolia3
Fossil records: 1 in the Paleobiology Database3
Discovery: Plesiohadros was named by Tsogtbaatar and colleagues in 2014 from a partial skeleton with skull found at the Alag Teg locality in Mongolia.1 2
Still debated: Scientists are still debating whether Plesiohadros was a true hadrosaurid or a more primitive hadrosauroid, since it has a mix of features.2

Where the facts come from

Plesiohadros (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Plesiohadros 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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