“Iguanodontia was one of the first dinosaur groups to be named and is one of the most diverse and widespread ornithischian clades, with fossils known from the Middle Jurassic to the Late Cretaceous,”

Ricardo Sacamoto · said date not stated · reported 2026-10-27

The quote describes Iguanodontia as one of the first dinosaur groups named and a diverse, widespread ornithischian clade.