Question 1

How do you say Mantellisaurus?

Accepted Answer

Mantellisaurus is pronounced man-TELL-ih-SOR-us. Break it into four chunks: man, then TELL with the stress hitting hard, then ih, then SOR-us. A good memory trick is to think of it as 'man TELL us' with a dinosaur roar at the end. The TELL part gets the most emphasis, just like the scientist Gideon Mantell whose name it honors. Say it a few times fast and it starts to roll right off the tongue.

Question 2

What does Mantellisaurus mean?

Accepted Answer

Mantellisaurus means Mantell's lizard. The first part of the name honors Gideon Mantell, the English doctor and fossil hunter who discovered Iguanodon back in the 1820s and was one of the first people to describe dinosaurs scientifically. The second part, saurus, comes from the Ancient Greek word sauros, which means lizard. The species name atherfieldensis means from Atherfield, pointing to Atherfield Point on the Isle of Wight in England where key fossils were collected. So the full name basically means Mantell's lizard from Atherfield.

Question 3

Is Mantellisaurus the same as Iguanodon?

Accepted Answer

They are closely related but not the same dinosaur. For over a hundred years, Mantellisaurus was called Iguanodon atherfieldensis and treated as just a species of Iguanodon. In 2007, paleontologist Gregory Paul argued that it was different enough to deserve its own genus name, Mantellisaurus. It is noticeably more slender and lighter built than the larger Iguanodon bernissartensis, and Paul argued it is actually more closely related to the African dinosaur Ouranosaurus than to true Iguanodon. Not all scientists agree on every detail, but most modern sources treat Mantellisaurus as its own separate genus.

Question 4

How big was Mantellisaurus?

Accepted Answer

Mantellisaurus grew to about 20 feet long, which is roughly the length of a large minivan. It weighed around 2,200 pounds, which is lighter than you might expect for a dinosaur that size. Gregory Paul noted that it was significantly more lightly built than Iguanodon, which could weigh twice as much. That lighter build probably made Mantellisaurus faster and more agile when it needed to move quickly. It stood roughly as tall as a basketball hoop when it reared up on its back legs.

Question 5

What did Mantellisaurus eat?

Accepted Answer

Mantellisaurus was a herbivore, meaning it ate only plants. It had a wide, flat beak at the front of its mouth for cropping ferns, horsetails, and other low-growing vegetation that was common in Early Cretaceous Europe. Behind the beak were rows of teeth that ground up tough plant material. It could drop down onto all four limbs to feed near the ground or rise up on its two powerful hind legs to reach higher plants. It would have needed to eat enormous quantities of vegetation every day to fuel a body weighing over a ton.

Question 6

Where did Mantellisaurus live?

Accepted Answer

Mantellisaurus lived in what is now Belgium, England, Spain, Germany, and Romania. During the Early Cretaceous period, roughly 137 to 120 million years ago, these were not the cold European countries we know today but warm subtropical islands and coastal plains with rich forests. Some of the best fossils come from Bernissart in Belgium and the Isle of Wight in England. The broad geographic spread of fossils suggests Mantellisaurus was a successful and widespread animal across Early Cretaceous Europe.

Question 7

What is the famous Bernissart discovery?

Accepted Answer

In 1878, coal miners digging deep underground in Bernissart, Belgium, accidentally broke into a massive deposit of dinosaur fossils. Scientists recovered the remains of dozens of iguanodontian dinosaurs, including specimens now recognized as Mantellisaurus, in extraordinary condition. Some skeletons were nearly complete and still articulated, which is incredibly rare. These fossils are now displayed at the Royal Belgian Institute of Natural Sciences in Brussels and are considered among the most important dinosaur discoveries in history. The Bernissart find gave scientists their first real look at what these animals looked like as whole animals rather than scattered fragments.

Question 8

Did Mantellisaurus walk on two legs or four?

Accepted Answer

Mantellisaurus could do both, which made it very flexible. Scientists call this being a facultative biped. When feeding close to the ground or moving slowly, it probably walked on all four limbs. When it needed to move fast, get a better view, or reach higher vegetation, it rose up onto its powerful hind legs. Its long, stiff tail acted as a counterbalance when it was upright, keeping it from tipping over. The bones of its wrist were partially fused and hoof-like, which helped support its weight when walking on all fours.

Mantellisaurus Pronunciation

Mantellisaurus Picture

What does Mantellisaurus mean?

Name Roots

Fun Facts

Learn More About Mantellisaurus

Related Dinosaurs