genus Pisanosaurus
pisanosaur
pisanosaurus
genus Staurikosaurus
herrerasaurus
herrerasaur
genus Herrerasaurus
genus Argentinosaurus
staurikosaurus
staurikosaur
argentinosaur
genus Eoraptor
ornithoscelidan
ornithomimid
tenontosaur
euornithopod
hadrosauriform
ornithomimosaurian
albertosaurine
marginocephalian
ornithocheiroid
albertosaur
aeolosaurian
abelisauroid
eudromaeosaur
eudromaeosaurian
pteranodontian
calamosaur
tyrannosaurine
tyrannosaurid
Marginocephalia
suborder Marginocephalia
suborder Ceratosaura
titanosauriform
herrerasaurid
titanosaurian
genus Psittacosaurus
abelisaur
nothosaurian
thescelosaur
duck-billed dinosaur
suborder Pachycephalosaurus
horned dinosaur
hadrosaur
centrosaurine
ceratopsian
allosaurus
Dinosaurian
allosaur
nodosaurian