genus Protoceratops
Ceratopsia
suborder Ceratopsia
protoceratops
genus Styracosaurus
genus Triceratops
bone-headed dinosaur
family Titanosauridae
Titanosauridae
genus Psittacosaurus
dinosauric
neotheropod
neornithischian
Holbrookia
suborder Ceratosaura
genus Holbrookia
scansoriopterigid
therizinosaurian
therizinosaur
Phrynosoma
genus Chlamydosaurus
genus Phrynosoma
genus Crotaphytus
Crotaphytus
Chlamydosaurus
genus Brontosaurus
lizardling
genus Apatosaurus
genus Ankylosaurus
neotheropodan
titanosauriform
deinonychosaurian
genus Coelophysis
monstersaurid
genus Barosaurus
reptile family
genus Ceratosaurus
suborder Pachycephalosaurus
suborder Theropoda
family Lacertidae
psittacosaur
Lacertidae
psittacosaurus
ichthyosaurus
dino
Theropoda
therizinosaurid
family Lanthanotidae
Lanthanotidae
Sauropoda