tanystropheid
protorosaur
phytosaurian
pterosauromorph
leanchoiliid
dinocaridid
dinosauriform
pachypleurosaurid
protorothyridid
aigialosaurid
order Ichthyosauria
phosphatocopid
dolichosaurid
allokotosaur
Ichthyosauria
ichthyosauriform
ichthyosauromorph
trematosauroid
aigialosaur
opisthodont
drepanosauromorph
archosauriform
crocodilian reptile
crocodilian
archaeopterodactyloid
nothosaurid
arctostylopid
eosauropterygian
pythonomorph
proterochampsian
capitosauroid
Eurypterida
dolichosaur
dsungaripteroid
champsosaurid
order Eurypterida
choristodere
stenopterygius
Pterodactylidae
anomalocarid
family Pterodactylidae
Stenopterygius quadrisicissus
trematosaur
genus Pterodactylus
necrosaur
trilophosaurid
Pterodactylus
batrachosauroidid
choristoderan
deinonychosaurian