Gideon Mantell, the discoverer of "Iguanodon". Gideon Mantell, discoverer of the dinosaur Iguanodon, also visited her at her shop. Dinosaurs from the locality include the ornithopods "Mantellisaurus", "Iguanodon", and small sauropods. The genus "Iguanodon" belongs to the larger group Iguanodontia, along with the duck-billed hadrosaurs. Dollo's specimens allowed him to show that Owen's prehistoric pachyderms were not correct for "Iguanodon". A dinner was held inside the mould used to make the "Iguanodon". Bones of a young "Iguanodon", also abraded, were found alongside this specimen. The remains of an "Iguanodon" (135 million years ago) was discovered in High Brooms. Her growls agitate the "Iguanodon", who stampede; the male hastily leaves. He was led to identify it as an "Iguanodon" based on its distinctive teeth. Immediate reception to Huxley's proposal of a new genus, distinct from "Iguanodon", was mixed. Of the most successful was the "Iguanodon", which spread to every continent. Owen presented three examples of such higher level reptiles&colon; "Iguanodon", "Hylaeosaurus" and "Megalosaurus". Of the most successful would be the "Iguanodon" which spread to every continent. The thumb spike is one of the best-known features of "Iguanodon".