- Euronithopoda, suborder Euronithopoda, euronithopod, Ornithopoda, suborder Ornithopoda - widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)
--1 is a kind of animal order
--1 is a member of Ornithischia, order Ornithischia
--1 has members:ornithopod, ornithopod dinosaur; Hadrosauridae, family Hadrosauridae; genus Trachodon; Iguanodontidae, family Iguanodontidae