Iguanodon, meaning "iguana tooth", was a medium-sized herbivorous Ornithopod Dinosaur from the Early Cretaceous of Europe and North America.
Iguanodon were bulky herbivores that could shift from bipedality to quadrupedality. They had a thumb spike on each of the front legs. Iguanodon lived in large herds of several hundred, often seen with a Polacanthus, and were hunted by Neovenators.
Iguanodon was one of the first Dinosaurs ever discovered and thus was reconstructed incorrectly many times (in a lizard-like shape and also a kangaroo-like shape). The thumb spike was incorrectly placed on the nose.
A juvenile Iguanodon came through an Anomaly to the present day on Guns Island. It broke its leg when it became trapped in a trench. Nick Cutter shot and killed the juvenile Iguanodon to put it out of its misery.
Later, when marooned in the Cretaceous coastal woodland, The ARC team witness hundreds of them moving on a plain below, associating with Polacanthus, while being hunted by Neovenators.
Matt Anderson and the Anomaly Research Centre team faced an Iguanodon at a Beauty School causing him to miss his appointment on the phone with Gideon. When he explained what happened, Gideon remarked that it "sounds messy", while Matt called the encounter "the best fun that he had ever had, in a very long time". It is unclear how the crisis was resolved.