Achelousaurus

Achelousaurus

Achelousaurus was a smaller species of Ceratoposian.  It lived in the Creatceous Period in  Montan, USA, in North America.  The fossil was found on the Blackfoot Indian Reservation by a team led by the Hadrosaur or Duckbill dinosaur expert John Horner of the Museum of the Rockies.  The fossil was initially thought to be a type of Styracosaurus.  Eventually it was named as a new species by Scott Sampson. . . the Paleontologist who is "Dr. Scott" in the TV Show Dinosaur Train.  

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Achelousaurus was about 6 meters or 20 feet long.  It weighed over 3 tons.  It is considered to be nearly as robust as the 30 feet long Triceratops.  It had 2 long horns on its frill but only bumpy protrusions on its snout.  I suppose that the frill horns would have made it difficult for a Tyrannosaur to reach over and bite its neck.