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