Sentences with phrase «by hadrosaurs»
Most of the tracks, made somewhere between 69 million and 72 million years ago, were left by hadrosaurs, commonly known as duck - billed dinosaurs (the crested creatures in this artist's representation).
http://www.sciencemag.org/ Not exact matches
Hadrosaurs are usually identified by bony crests that extended from the skull, although Edmontosaurus doesn't have such a hard crest (paleontologists have discovered that it had a fleshy crest).
Based on the shape and structure of the fossilized tendon discovered by the team, Erickson and Druckenmiller determined that it is from a large ornithopod dinosaur, probably a hadrosaur.
He and his research team through funding by the National Science Foundation, have found two new dinosaurs in Antarctica including a «Jurassic Park - like» raptor or deinonychosaur in 2003 and a duck - billed dinosaur or hadrosaur in 1997, both finds added new families of dinosaurs to the list of Antarctic dinosaurs.