The Iguanodontia (the iguanodonts) are a clade of herbivorous dinosaurs that lived from the Middle Jurassic to Late Cretaceous. Some members include Camptosaurus...

bipedal and relatively small-sized, while advanced members of the subgroup Iguanodontia became quadrupedal and developed large body size. Their major evolutionary...

to define Dinosauria. The genus Iguanodon belongs to the larger group Iguanodontia, along with the duck-billed hadrosaurs. The taxonomy of this genus continues...

around the same time have instead found these latter taxa to be within Iguanodontia. Hypsilophodontidae was named originally in 1882 by Louis Dollo, as a...

E. Poole recovered a large Hypsilophodontidae as the sister taxon of Iguanodontia, which consisted of several "traditional" hypsilophodontids, as well...

However, Paul Sereno (1986) found that Rhabdodon and Mochlodon were within Iguanodontia. The ICZN (1988) resolved this complication, selecting the ornithopod...

while the latter typically includes Hypsilophodon and the more derived Iguanodontia. Neornithischia was first named by Cooper in 1985 and defined as "all...

as the sister taxon to the clade containing Thescelosaurus and the Iguanodontia. Ampelognathus was thus likely more closely related to iguanodontians...

†Orodrominae (burrowers) †Thescelosaurinae (large thescelosaurids) †Iguanodontia ("iguana teeth"; advanced ornithopods) †Elasmaria (mostly southern ornithopods...

Chordata Clade: Dinosauria Clade: †Ornithischia Clade: †Ornithopoda Clade: †Iguanodontia Genus: †Tenontosaurus Ostrom, 1970 Species †T. tilletti Ostrom, 1970...