titanosauriform
genus Protoceratops
suborder Pachycephalosaurus
Marginocephalia
suborder Ornithopoda
euronithopod
Ornithopoda
suborder Euronithopoda
marginocephalian
suborder Marginocephalia
Euronithopoda
Tyrannosaurus rex
order Ictodosauria
Ictodosauria
genus Antrodemus
dinosaurlike
horned dinosaur
suborder Ceratosaura
cerapodan
allosaur
diplodocid
dinosauriform
family Uintatheriidae
ceratopsian
Uintatheriidae
genus Allosaurus
crocodilian reptile
protoceratopsid
archeopyle
ankylosauromorph
order Ornithischia
crocodilian
Ornithischia
theropod dinosaur
diplodocoid
Archaeornithes
frill
bird-footed dinosaur
theropod
dinosaur
subclass Archaeornithes
archosaurian
archosaur
megaraptorid
neornithine
sauropodomorphan
ankylosaurian
archosaurian reptile
neornithischian
plateosaurian