genus Struthiomimus
genus Edmontosaurus
suborder Ceratosaura
Sauropoda
suborder Sauropoda
genus Coelophysis
genus Ceratosaurus
suborder Theropoda
Theropoda
neosauropod
suborder Pachycephalosaurus
saurolophid
suborder Marginocephalia
Marginocephalia
marginocephalian
order Thecodontia
trachodon
trachodont
Thecodontia
Chronoperates paradoxus
turiasaurian
titanosauriform
Cretacean
neornithischian
genus Apatosaurus
genus Brontosaurus
cetiosaur
Prosauropoda
hylaeosaurus
order Rhynchocephalia
nontitanosauriform
suborder Prosauropoda
Ceratopsidae
family Ceratopsidae
Rhynchocephalia
caseasaur
scansoriopterigid
neotheropod
macronarian
sauropodous
predentary
Mantell
paleoconnection
sauropod
albertosaurus
dinosauric
Gideon Mantell
sauropodomorphan
Gideon Algernon Mantell
genus Protoceratops