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Fukuisaurus

Say it: foo-koo-I-sore-us

Name means: “Fukui lizard”1

Ate: PlantsBeaked plant-eatersEarly Cretaceous

Fukuisaurus was a medium-sized plant-eating dinosaur that lived in what is now Japan. It had a strong beak for snipping plants and could walk on two legs or all fours.2 1

Lived

121 to 113 million years ago4

Early Cretaceous

Fossils found in

Katsuyama, Fukui Prefecture, Japan2 4

Food

Plants4 1

Length

4.5 to 4.7 m2 1

estimates vary

Weight

400 kg2

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 13 big dogs

as long as 5 dogs nose to tailas long as 26 bananas end to endas heavy as 80 watermelons

How big was Fukuisaurus compared to YOU?

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cool stuff

Fun facts

Fukuisaurus was named in 2003 by scientists Yoshitsugu Kobayashi and Yoichi Azuma.2 1

Its skull was not kinetic, meaning its upper jaw was fused and could not move sideways while chewing.2

Fukuisaurus lived during the Early Cretaceous period, about 121 to 99 million years ago.1

The first fossils were discovered in 1989 in the Kitadani Formation of Fukui Prefecture.2

Only a skull and some other bones have been found, so scientists guess what the rest of its body looked like based on similar dinosaurs.1

Fukuisaurus was about 4.5 to 4.7 meters long and weighed around 400 kilograms, similar to a large cow.2 1

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

?How big was Fukuisaurus?

Fukuisaurus was about 4.5 to 4.7 meters long and weighed around 400 kilograms, similar to a large cow.1 2

?What did Fukuisaurus eat?

Fukuisaurus was a herbivore, meaning it ate plants. It had a strong beak for snipping plants.1 2

?When did Fukuisaurus live?

Fukuisaurus lived during the Early Cretaceous period, about 121 to 99 million years ago.1 2

?Where was Fukuisaurus found?

Fukuisaurus fossils were discovered in 1989 in the Kitadani Formation of Fukui Prefecture, Japan.2 3

?Was Fukuisaurus a dinosaur?

Yes, Fukuisaurus was a dinosaur. It was a type of ornithopod, a plant-eating dinosaur.1 2

?Could Fukuisaurus walk on two legs?

Yes, Fukuisaurus could walk on two legs or all fours. It was bipedal but could also move on all fours when needed.2

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For dino experts

Scientific name: Fukuisaurus
Named by: Kobayashi and Azuma 20034
Group: Beaked plant-eaters
Family / clade: Hadrosauroidea4
Classification: Ornithischia > Ornithopoda > Iguanodontia4
Age of the rocks: 121 to 113 million years (Aptian)4
Rock formations: Kitadani4
Countries: Japan4
Fossil records: 1 in the Paleobiology Database4
Discovery: Fukuisaurus was discovered in 1989 in Katsuyama, Fukui Prefecture, Japan, and named in 2003 by Yoshitsugu Kobayashi and Yoichi Azuma.2 1
Still debated: Scientists are not sure if Fukuisaurus was a hadrosauroid or a more primitive styracostern, because different studies place it in different groups.2

Where the facts come from

Fukuisaurus | Natural History Museum (nhm.ac.uk)
Fukuisaurus (en.wikipedia.org)
FPDM: Dinosaurs - Fukui Prefectural Dinosaur Museum (dinosaur.pref.fukui.jp)
Fukuisaurus 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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