protorosaur
dinosauriform
tanystropheid
ichthyosauromorph
ichthyosauriform
protorothyridid
phytosaurian
pterosauromorph
aigialosaurid
dinocaridid
aphanosaur
archosaur
dolichosaurid
subarctometatarsus
archosauromorph
order Ichthyosauria
Ichthyosauria
aigialosaur
leanchoiliid
allokotosaur
necrosaur
nothosaurid
archosauriform
archegosaurid
casquehead
phosphatocopid
arctostylopid
drepanosauromorph
order Eurypterida
Eurypterida
stegosaurian
hadrosauriform
baracromian
neotheropod
dinosauromorph
aeolosaurid
genus Stenopterygius
neoceratopsian
crocodilian
archaeopterodactyloid
archosaurian reptile
nothosaur
archosaurian
crocodilian reptile
pilosaurid
anomalocarid
opisthodont
Stenopterygius quadrisicissus
neotetanuran
polyglyphanodontian