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Jianchangosaurus

Say it: JEE-ONG-chang-oh-SORE-us
Name means: “Jianchang lizard”1
Ate: PlantsOdd feathered dinosEarly Cretaceous

Jianchangosaurus was a small, feathered dinosaur that walked on two legs. It lived about 125 million years ago in what is now China. This dinosaur had a beak and teeth like a plant-eater, but scientists once thought it might eat meat.21

Lived
126 to 120 million years ago4
Early Cretaceous
Fossils found in
Liaoning Province, China31
Length
up to 2 m (6.6 ft)2
estimated
Weight
up to 26 kg (57 lb)2
Height
up to 1 m (3.3 ft)2
at the hips
Top speed
about 27 km/h (17 mph)
Running, estimate
What did Jianchangosaurus eat?
It was a plant-eater. Its teeth were shaped to slice plant fibres, and it had a beak at the front of its mouth.

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Jianchangosaurus about 2 m long (6.6 ft)A dog about 1 m (3.3 ft)A bicycle about 1.8 m (5.9 ft)A car about 4.5 m (15 ft)

How tall was it?

A house catabout 0.3 m (1 ft)A dogabout 0.5 m (1.6 ft)Jianchangosaurusabout 1 m tall (3.3 ft)A horseabout 1.6 m (5.2 ft)

at the hips

How heavy was it?

as heavy as 6 house cats
as long as 4 house cats nose to tailas long as 11 bananas end to endas heavy as 5 watermelonscould run 100 metres in 13 seconds (the fastest human needs 9.6)

How big was Jianchangosaurus compared to YOU?

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How fast was it?

cool stuff

Fun facts

1

Jianchangosaurus had wide, unbranched feathers on its neck that may have been used for display, like a peacock's tail.32

2

It is one of the most complete therizinosaur skeletons ever found, missing only the tip of its tail.3

3

Its teeth were set in a shelf-like jaw, similar to some plant-eating dinosaurs like ornithopods and ceratopsians.3

4

Jianchangosaurus was about 2 meters (6.6 feet) long and stood 1 meter (3.3 feet) tall at the hips.2

5

It lived during the Early Cretaceous period, between about 125 and 119 million years ago.1

6

The fossil was found in the Yixian Formation in China, a famous site for feathered dinosaurs.31

AI-madeAI-made picture of Jianchangosaurus
An AI-made picture of how Jianchangosaurus 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 Jianchangosaurus

?How big was Jianchangosaurus?

About 2 metres (6.6 feet) long and 1 metre (3.3 feet) tall at the hips. It probably weighed around 26 kilograms (57 pounds).2

?What did Jianchangosaurus eat?

It was a plant-eater. Its teeth were shaped to slice plant fibres, and it had a beak at the front of its mouth.23

?Did Jianchangosaurus have feathers?

Yes. Impressions of wide, unbranched feathers were found with its skeleton, similar to those of Beipiaosaurus.23

?When did Jianchangosaurus live?

It lived about 126 million years ago, during the Early Cretaceous Period.2

?Where was Jianchangosaurus found?

Its fossil was found in Jianchang County, Liaoning Province, China, in the Yixian Formation.2

?Was Jianchangosaurus a dinosaur?

Yes, it was a theropod dinosaur, specifically a therizinosaur.24

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Myth buster

Myth: Jianchangosaurus was a meat-eater because it is a theropod.

Truth: Although it belongs to the theropod group, Jianchangosaurus had a beak and teeth suited for eating plants, and scientists now think it was a herbivore.21

For dino experts

Scientific name
Jianchangosaurus
Named by
Pu et al. 20134
Group
Odd feathered dinos
Family / clade
Therizinosauria4
Classification
Theropoda > Therizinosauria4
Age of the rocks
126 to 120 million years (Barremian / Aptian)4
Rock formations
Yixian4
Countries
China4
Fossil records
1 in the Paleobiology Database4
Discovery
Jianchangosaurus was named in 2013 by Pu and colleagues based on a nearly complete skeleton found in Liaoning Province, China.13
Still debated
Scientists are not sure if the wide, unbranched feathers on Jianchangosaurus were used mainly for display or for other purposes like keeping warm.32

Where the facts come from

  1. PBDB Taxon (paleobiodb.org)
  2. Jianchangosaurus (en.wikipedia.org)
  3. An Unusual Basal Therizinosaur Dinosaur with an Ornithischian Dental Arrangement from Northeastern China (pmc.ncbi.nlm.nih.gov)
  4. Jianchangosaurus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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Also from the same time: Early Cretaceous

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