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Carinodens

Say it: KAR-in-oh-denz
Name means: “keel teeth”1
Ate: MeatMosasaursLate CretaceousNot technically a dinosaur

Carinodens was a small mosasaur, a marine lizard that lived in the late Cretaceous seas. It had round, blunt teeth like a set of nutcrackers for crushing hard-shelled animals. At only about 2 to 2.6 metres long, it was one of the tiniest mosasaurs ever.1

Fun fact: this sea reptile swam while dinosaurs walked on land. Everyone calls them dinos, but they were a different branch of reptiles.
Lived
72 to 66 million years ago3
Late Cretaceous
Fossils found in
Belgium, the Netherlands, Denmark, Morocco, Brazil, Ukraine, Russia, and Maryland (USA)31
Food
Meat1
Length
2 to 2.6 m1
Top speed
about 30 km/h (19 mph)
Swimming, estimate

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Carinodens about 2.6 m longA dog about 1 mA bicycle about 1.8 mA car about 4.5 m
as long as 2.5 dogs nose to tailas long as 14 bananas end to end

How big was Carinodens compared to YOU?

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How fast was it?

cool stuff

Fun facts

1

Carinodens was first thought to be a crocodile! A fossil jaw was originally named Bottosaurus belgicus and considered a crocodilian before being recognized as a mosasaur.1

2

Its teeth were very different from each other. The front teeth were round and curved, while the back teeth were flat and blade-like with a keel on each side.1

3

Scientists can tell what Carinodens ate by looking at tiny scratches on its teeth. The wear patterns show it munched on hard-shelled animals that lived on the seafloor.1

4

Carinodens is closely related to Globidens, another mosasaur with crushing teeth. Together they belong to a group called Globidensini.1

5

The name Carinodens means 'keel teeth' because its teeth have a ridge like the keel of a boat. It replaced the older name Compressidens, which was already used for a different animal.1

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

?What did Carinodens eat?

Carinodens ate hard-shelled animals like clams, oysters, and sea urchins. Its blunt teeth were perfect for crushing them, and scratches on the teeth show it munched on creatures that lived on the seafloor.12

?How big was Carinodens?

Carinodens was about 2 to 2.6 metres (6.6 to 8.5 feet) long. That makes it one of the smallest mosasaurs ever.1

?Where did Carinodens live?

Carinodens lived in the late Cretaceous seas, and its fossils have been found in Europe, North America, South America, and North Africa. Most skull fossils come from the Netherlands and Belgium.1

?Is Carinodens a dinosaur?

No, Carinodens is not a dinosaur. It is a marine lizard called a mosasaur that lived in the sea during the time of the dinosaurs.1

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For dino experts

Scientific name
Carinodens
Named by
Thurmond 19693
Group
Mosasaurs
Family / clade
Mosasauridae3
Classification
Mosasauroidea3
Age of the rocks
72 to 66 million years (Maastrichtian)3
Rock formations
Maastricht, Gramame, Bereza Beds3
Countries
Netherlands, Morocco, Brazil, Ukraine, Russia, Belgium3
Fossil records
16 in the Paleobiology Database3
Discovery
The first fossils were found in Belgium and described by Louis Dollo in 1913 as Globidens fraasi. In 1969, J.T. Thurmond gave it the new name Carinodens because the old name was already taken.1
Still debated
Scientists are not sure how many species of Carinodens existed. Some think C. belgicus and C. fraasi might be the same species, while others believe they are different based on tooth shape.1

Where the facts come from

  1. Carinodens (en.wikipedia.org)
  2. Feeding the Mechanical Mosasaur: what did Carinodens eat? | Netherlands Journal of Geosciences | Cambridge Core (cambridge.org)
  3. Carinodens in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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More from the same group: Mosasaurs

Also from the same time: Late Cretaceous

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