hylaeosaurus
tyrannoraptoran
family Uintatheriidae
massopodan
Uintatheriidae
deinonychosaurian
ichthyoarchaeological
Ictodosauria
Pelycosauria
order Pelycosauria
Pendraig
order Ictodosauria
genus Coelophysis
albertosaurine
genus Psittacosaurus
subarctometatarsus
neosauropod
Stenopterygius quadrisicissus
Marginocephalia
stenopterygius
suborder Marginocephalia
scansoriopterygid
genus Protoceratops
genus Ceratosaurus
marginocephalian
baracromian
scansoriopterigid
genus Styracosaurus
genus Ankylosaurus
nothosaurian
neoceratopsian
theropod
tyrannosaurid
dinosauric
dryomorphan
macronarian
camarasaur
allosaurus
hadrosauriform
allosaur
suborder Pachycephalosaurus
seismosaurus
dryomorph
anaptomorphine
megaraptorid
aigialosaurid
arachnomorph
arthropterygium