ichthyosaurus
Titanosaurus
hylaeosaurus
Seismosaurus
albertosaur
genus Seismosaurus
genus Protoceratops
genus Ceratosaurus
thescelosaur
dinocephalian
herrerasaurid
paleovertebrate
ankylosauromorph
suborder Ceratopsia
therizinosaurian
therizinosaur
Ceratopsia
Tyrannosaurus rex
ankylopollexian
styracosaurus
suborder Pachycephalosaurus
styracosaur
stegosaurian
family Ceratopsidae
Ceratopsidae
genus Anatotitan
seismosaur
genus Psittacosaurus
nodosaurian
megaraptoran
rhynchosaur
family Lacertidae
ground-shaker
Lacertidae
Pendraig
bone-headed dinosaur
hadrosauriform
titanosauriform
coelophysis
coelurosaurian
neotheropodan
dryomorph
eusaurischian
abelisauroid
diplodocoid
camarasaur
neotetanuran
dinosaur
dryomorphan
suborder Ceratosaura