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Ignavusaurus

Say it: ig-NAV-uh-SORE-us
Name means: “coward lizard”1
Ate: PlantsLong-necksEarly Jurassic

Ignavusaurus was a small, long-necked dinosaur that lived in what is now Lesotho in Africa about 200 million years ago. It was a plant-eater and probably ran around on two legs, using its long tail for balance.1

Lived
201 to 193 million years ago2
Early Jurassic
Fossils found in
Ha Ralekoala, Lesotho, Africa1
Food
Plants2
Length
1.5 m1
holotype was a fast-growing juvenile, less than one year old
Weight
22.5 kg1

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Ignavusaurus about 1.5 m longA house cat about 0.5 mA dog about 1 mA bicycle about 1.8 m

How heavy was it?

as heavy as 6 house cats
as long as 3 house cats nose to tailas long as 8 bananas end to endas heavy as 4 watermelons

How big was Ignavusaurus compared to YOU?

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

cool stuff

Fun facts

1

The name Ignavusaurus comes from the Latin word for 'coward' because it was found at a place called Ha Ralekoala, which means 'the place of the father of the coward'.1

2

The only known fossil of Ignavusaurus is a nearly complete skeleton of a baby that was less than one year old when it died.1

3

Its skull was broken into more than 120 pieces, but scientists were able to put it back together.1

4

Ignavusaurus had a long, slender neck and a long tail, just like its relatives Massospondylus and Melanorosaurus.1

5

Some scientists think Ignavusaurus might actually be a baby Massospondylus, because the two look very similar.1

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

?How big was Ignavusaurus?

About 1.5 metres (4.9 ft) long and weighed about 22.5 kilograms (50 lb). That is roughly the size of a large dog.1

?What did Ignavusaurus eat?

It was a plant-eater, or herbivore. It had a long neck to reach leaves and other plants.1

?Is Ignavusaurus a dinosaur?

Yes, it is a dinosaur. It was a basal sauropodomorph, a type of long-necked, plant-eating dinosaur.1

?Could Ignavusaurus be a baby Massospondylus?

Some scientists think so. They say the only known fossil looks very similar to a young Massospondylus, so Ignavusaurus might be the same dinosaur.1

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Scientific name
Ignavusaurus
Named by
Knoll 20102
Group
Long-necks
Family / clade
Massospondylidae2
Classification
Sauropodomorpha2
Age of the rocks
201 to 193 million years (Hettangian / Sinemurian)2
Rock formations
Elliot2
Countries
Lesotho2
Fossil records
2 in the Paleobiology Database2
Discovery
The fossils were found in Lesotho and described in 2010 by Spanish paleontologist F. Knoll. The skeleton was brought to the National Museum of Natural History in Paris for study.1
Still debated
Scientists are not sure if Ignavusaurus is a separate species or just a young Massospondylus.1

Where the facts come from

  1. Ignavusaurus (en.wikipedia.org)
  2. Ignavusaurus in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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More from the same group: Long-necks

Also from the same time: Early Jurassic

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