genus Psittacosaurus
genus Styracosaurus
Titanosauridae
family Titanosauridae
nodosaurian
Prosauropoda
suborder Prosauropoda
genus Triceratops
genus Protoceratops
marginocephalian
Marginocephalia
suborder Marginocephalia
paleovertebrate
suborder Ceratosaura
Ceratopsia
Pendraig
suborder Ceratopsia
suborder Pachycephalosaurus
psittacosaurus
suborder Theropoda
therizinosaurian
ankylosauromorph
therizinosaur
neornithischian
Theropoda
neotheropod
dinosauromorph
theropod
alamosaur
deinonychosaurian
genus Ceratosaurus
family Uintatheriidae
titanosauriform
Uintatheriidae
suchomimus
thescelosaur
genus Corythosaurus
caseasaur
therizinosauroid
Seismosaurus
neotheropodan
genus Seismosaurus
theropod dinosaur
camarasaur
bird-footed dinosaur
Titanosaurus
archosaurian
archosaur
genus Titanosaurus
archosaurian reptile