The first of these monsters is the iguanodon, the earliest known individual of the “bird-footed” division (Ornithopoda).
The American Hadrosaurus must have decidedly resembled the iguanodon.
iguanodon Mantelli is smaller and more slender looking, with a height of over ten feet, and a length of about twenty feet.
"I think it can have been no other than the iguanodon," said the doctor.
iguanodon, i-gw′no-don, n. a large extinct herbivorous reptile, with teeth like those of the iguana.
If it's not an iguanodon, it's a prehistoric animal of some sort.
In some of them such as Stegosaurus the exoskeleton is strongly developed, in others such as iguanodon it is absent.
The iguanodon was an herbivorous terrestrial reptile that formerly inhabited England.
As in iguanodon, there were three toes to the hind feet, and these were probably covered by strong hoofs.
It was carnivorous, and therefore more ferocious than the iguanodon, and more ready to attack.