Dino card No. 0028 of 2,027

Adynomosaurus

Say it: ad-ee-NO-mo-SORE-us

Name means: “weak-shouldered lizard”1

Ate: PlantsDuck-billsLate Cretaceous

Adynomosaurus was a duck-billed dinosaur that lived on a big island in what is now Spain. It had a weak shoulder blade, so its arms were not very strong. This plant-eater walked on four legs but could also run on two.1

Lived

72 to 66 million years ago3

Late Cretaceous

Fossils found in

Catalonia, Spain1

Food

Plants3 1

Length

7.8 m2

largest known specimen

Weight

2.3 tonnes2

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 1.5 cars

as long as 8 dogs nose to tailas long as 43 bananas end to endas heavy as 77 big dogsas heavy as 460 watermelons

How big was Adynomosaurus compared to YOU?

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cool stuff

Fun facts

Adynomosaurus had a very weak shoulder blade, which means its arm muscles were smaller than those of other duck-billed dinosaurs.1

Its name comes from Greek words meaning 'weak shoulder' because of that special shoulder bone.1

This dinosaur lived on the Ibero-Armorican island, a huge island that was part of Europe during the Late Cretaceous.1

Adynomosaurus is known from only a few bones, including a shoulder blade, leg bones, and parts of the spine.1

It lived about 70 million years ago, near the end of the Age of Dinosaurs.1

The fossils were found in a wheat field near the village of Basturs in Spain in 2012.1

Adynomosaurus shared its home with other dinosaurs like the titanosaur Abditosaurus and the rhabdodont Pareisactus.1

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

?How big was Adynomosaurus?

Nobody knows for sure because only a few bones have been found, including a shoulder blade and leg bones. It was a medium-sized duck-billed dinosaur, but scientists do not have enough fossils to give an exact length or weight.1 3

?What did Adynomosaurus eat?

It was a plant-eater, or herbivore. It had a beak and many teeth for chewing tough plants.1 3

?When did Adynomosaurus live?

It lived about 70 million years ago, during the Late Cretaceous period. That was near the end of the Age of Dinosaurs.1

?Where was Adynomosaurus found?

Its fossils were found in a wheat field near the village of Basturs in Catalonia, Spain. It lived on a big island called the Ibero-Armorican Island.1 3

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For dino experts

Scientific name: Adynomosaurus
Named by: Prieto-Márquez et al. 20193
Group: Duck-bills
Family / clade: Hadrosauridae3
Classification: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae3
Age of the rocks: 72 to 66 million years (Maastrichtian)3
Rock formations: Conques3
Countries: Spain3
Fossil records: 1 in the Paleobiology Database3
Discovery: Adynomosaurus was discovered in 2012 in a wheat field in Catalonia, Spain. Scientists named it in 2019, using the Greek words for 'weak shoulder' because of its unusual shoulder blade.1
Still debated: Scientists are not sure which other duck-billed dinosaurs Adynomosaurus is most closely related to. Some studies place it near Tsintaosaurus, while others think it might not even be a true hadrosaurid.1

Where the facts come from

Adynomosaurus (en.wikipedia.org)
Adynomosaurus arcanus | Dinosaur Database by DinoAnimals.com (dinoanimals.com)
Adynomosaurus 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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