Triassic
family Hadrosauridae
Ictodosauria
Triassic period
ankylosaur
order Ictodosauria
genus Anatotitan
dino
Hadrosauridae
titanosauriform
neosauropod
cerapodan
trachodont
genus Brontosaurus
caseasaur
genus Apatosaurus
neornithischian
order Ornithischia
trachodon
Ornithischia
macronarian
ankylosaurid
Sauroctonos
neotetanuran
vulcanodontid
bone-headed dinosaur
Dinosaurian
stegosaurid
dinosauroid
nontitanosauriform
tetanuran
subarctometatarsus
ankylosauromorph
melanorosaurid
corytophanine
tyrannoraptoran
megaraptoran
Pterosauria
eusaurischian
suborder Marginocephalia
thescelosaur
marginocephalian
megalosaur
massopodan
order Pterosauria
Marginocephalia
suborder Pachycephalosaurus
anurognathid
megalosaurus