Exactly what the hell kind of dinosaur is Denver? He doesn't resemble any of the dinosaurs I've ever heard of.
The last kind.
The cartoon kind. He can kinda talk and has pseudopsychic powers, and your beef is with his taxonomy?
The Other Wiki identifies him as a Corythosaurus, a member of the duck-billed dinosaurs. No source is cited, though.
He's an entirely fictional species (which, as far as I remember, Dr. Funt even points out in the show). His head crest resembles a Corythosaurus, but the rest of his character design seems to be a mish-mash of various dinosaur species.
You know, for a kid who's supposedly from California, the one with the sunglasses sounds a lot like a Corleone.