The Pleurocoelus is the state dinosaur. Fossil evidence shows that Pleurocoelus traveled in groups with the young on the inside, probably so they could be protected by the larger adults. Pleurocoelus means "hollow side" because of the way its vertebrae (backbones) are scooped out along the sides.
Length: 45 feet
Weight: 10 tons
Time: 119 - 105 million years ago
Where Found: Central and North-Central Texas, Maryland and England
Think About It: If a small car weighs 2 tons, how many cars would it take to equal the weight of a Pleurocoelus?