Sauropoda
ichthyosaurus
genus Psittacosaurus
subarctometatarsus
caseasaur
cetiosaur
order Ornithischia
Ornithischia
megaraptoran
megalosaurus
thescelosaur
dinosauriform
suborder Pachycephalosaurus
family Lanthanotidae
Lanthanotidae
subclass Archaeornithes
neotetanuran
megalosaur
Archaeornithes
allosaurus
allosaur
nodosaurian
paleovertebrate
hylaeosaurus
dino
corytophanine
ornithomimosaurian
dinocephalian
theropod dinosaur
theropod
eusaurischian
bird-footed dinosaur
ceratosaurus
tyrannosaurid
ankylosaurus
melanorosaurid
ornithopod dinosaur
unenlagiid
crocodilian reptile
ornithopod
dinosaur
crocodilian
ceratosaur
neotheropodan
centrosaurine
eusauropod
pachyrostran
eudromaeosaur
stegosaurian
eudromaeosaurian