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Neimongosaurus

Say it: nay-MONG-oh-SORE-us
Name means: “Nei Mongol lizard”1
Ate: PlantsOdd feathered dinosLate Cretaceous

Neimongosaurus was a small, plant-eating dinosaur with a very long neck and a short tail. It lived in what is now China and Kazakhstan during the Late Cretaceous period, about 85 to 72 million years ago.14

Lived
86 to 72 million years ago4
Late Cretaceous
Fossils found in
Fossils were found in the Iren Dabasu Formation in Inner Mongolia, China, and also in the Bostobe Formation in Kazakhstan.14
Food
Plants14
Length
2 to 3 m1
estimated by Zhang et al. in 2001; Gregory S. Paul in 2016 estimated 3 m
Weight
up to 350 kg1

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Neimongosaurus about 3 m longA dog about 1 mA bicycle about 1.8 mA car about 4.5 mAn elephant, the biggest land animal today about 6.5 m

How heavy was it?

as heavy as 12 big dogs
as long as 3 dogs nose to tailas long as 17 bananas end to endas heavy as 70 watermelons

How big was Neimongosaurus compared to YOU?

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

cool stuff

Fun facts

1

Neimongosaurus had one of the longest necks of any non-bird theropod, with about 14 neck vertebrae. That is more than most other meat-eating dinosaurs had.1

2

Its tail was fairly short, with only 22 tail vertebrae, which is unusual for a theropod.1

3

The front of its lower jaw was toothless, like a beak, and it had only a few teeth further back. This helped it eat plants.1

4

Its arm bones show a large bump for the biceps muscle, which may have given it strong arms for pulling branches.1

5

The vertebrae in its spine were hollow and filled with air spaces, a feature also seen in some advanced bird-like dinosaurs.2

6

Scientists think Neimongosaurus was closely related to oviraptorosaurs because of its long neck and short tail.2

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

?How big was Neimongosaurus?

About 2 to 3 metres long. It weighed around 350 kg, which is about the weight of a small horse.1

?What did Neimongosaurus eat?

It ate plants. Its lower jaw had a toothless, beak-like front and only a few teeth with serrated edges in the back.1

?Did Neimongosaurus have feathers?

Scientists think it likely had feathers, because its relatives (therizinosaurs) are often shown with feathers, but no direct feather fossils have been found for this species.1

?When did Neimongosaurus live?

It lived during the Late Cretaceous period, about 85 to 72 million years ago, in what is now China.13

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Myth buster

Myth: Some people think all theropods were meat-eaters.

Truth: Neimongosaurus was a theropod, but it was a herbivore. It ate plants, as shown by its toothless beak and leaf-shaped teeth.14

For dino experts

Scientific name
Neimongosaurus
Named by
Zhang et al. 20014
Group
Odd feathered dinos
Family / clade
Therizinosauridae4
Classification
Theropoda > Therizinosauria4
Age of the rocks
86 to 72 million years (Santonian / Campanian)4
Rock formations
Iren Dabasu, Bostobe4
Countries
China, Kazakhstan4
Fossil records
2 in the Paleobiology Database4
Discovery
In 1999, a team from the Ministry of Land and Resources in Inner Mongolia found two skeletons at Sanhangobi, about 20 km southwest of Erenhot. In 2001, scientists named the new species Neimongosaurus yangi, honoring Chinese paleontologist Yang Zhongjian.1
Still debated
Scientists are not sure exactly where Neimongosaurus sits on the family tree. Some studies place it outside the therizinosaurid group, while others put it inside, close to Therizinosaurus.1

Where the facts come from

  1. Neimongosaurus (en.wikipedia.org)
  2. A LONG-NECKED THERIZINOSAUROID DINOSAUR FROM THE UPPER CRETACEOUS IREN DABASU FORMATION OF NEI MONGOL, PEOPL E’S REPUBLIC OF CHINA (vertpala.ac.cn)
  3. Neimongosaurus (en.wikipedia.org)
  4. Neimongosaurus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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