neornithischian
order Rhynchocephalia
sauropodomorphan
taneid
ankylopollexian
Kenorland
Uintatheriidae
trachelostylid
genus Protoavis
cystoporate
stag
troglodyte
stegosaurine
deinonychosaurian
family Uintatheriidae
paleoecologic
choristodere
titanosauriform
cirriped
Archaeopteryx lithographica
tadpole shrimp
family Hadrosauridae
archeopteryx
pygocephalomorph
archaeopteryx
nothosaurian
archaeobotany
amphipod
Saurischia
genus Brontosaurus
order Saurischia
order Pelycosauria
Hadrosauridae
genus Apatosaurus
sphenacodont
Pelycosauria
Ornithischia
order Ornithischia
sancyite
psittacosaurus
trepostome
doreite
turiasaurian
Hynerpeton bassetti
plesiosaurian
Latimeridae
macrochoanite
ordanchite
paleocytology
family Latimeridae