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Yunmenglong

Say it: yoon-MENG-long

Name means: “Yunmeng dragon, after the Yunmengshan area where it was found”1

Ate: PlantsLong-necksEarly Cretaceous

Yunmenglong was a giant, long-necked plant-eater that lived in what is now central China. It had a very long neck, like a giraffe, and was one of the biggest dinosaurs in its region.2 1

Lived

121 to 100 million years ago4

Early Cretaceous

Fossils found in

Henan Province, central China2 1

Food

Plants3

Length

20 to 27 m1

estimates vary

Weight

29 tonnes to 30 tonnes1

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 5 elephants

as long as 6 cars parked in a rowas long as 150 bananas end to endas heavy as 6000 watermelons

How big was Yunmenglong compared to YOU?

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cool stuff

Fun facts

Yunmenglong's neck bones were very long and had deep hollows called pleurocoels, which helped make its neck light.2

Its thigh bone (femur) was about 1.92 metres (6.3 feet) long, showing it was a giant.1

Yunmenglong lived during the Early Cretaceous period, about 121 to 100 million years ago.3

It is part of a group of long-necked sauropods that includes Euhelopus, Qiaowanlong, and Erketu.2

The name Yunmenglong means 'Yunmeng dragon', named after the Yunmengshan area where its fossils were found.1

Scientists think Yunmenglong may have been closely related to other Asian long-necked dinosaurs, forming a unique group.2

AI-made picture of Yunmenglong — An AI-made picture of how Yunmenglong 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.

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For dino experts

Scientific name: Yunmenglong
Named by: Lü et al. 20134
Group: Long-necks
Family / clade: Somphospondyli4
Classification: Sauropodomorpha > Sauropoda > Macronaria4
Age of the rocks: 121 to 100 million years (Aptian / Albian)4
Rock formations: Haoling4
Countries: China4
Fossil records: 1 in the Paleobiology Database4
Discovery: Yunmenglong was named and described in 2013 by Junchang Lü and colleagues, based on an incomplete skeleton found in the Haoling Formation of the Ruyang Basin, Henan Province, China.2 1
Still debated: Scientists are still debating exactly how Yunmenglong is related to other long-necked sauropods, and whether it belongs in a special Asian group.2

Where the facts come from

Yunmenglong (en.wikipedia.org)
A new sauropod dinosaur (Dinosauria, Sauropoda) from the late Early Cretaceous of the Ruyang Basin (central China) (sciencedirect.com)
PBDB Taxon (paleobiodb.org)
Yunmenglong 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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