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