Permian
Permian period
Triassic
Triassic period
Ictodosauria
order Ictodosauria
Jurassic period
Jurassic
Cretaceous period
Cretaceous
Carboniferous
Carboniferous period
dinosaur
Mesozoic
crocodilian reptile
subclass Synapsida
crocodilian
Synapsida
hylaeosaurus
order Therapsida
Siderian
Therapsida
reptiliferous
Aegyptopithecus
paleozoology
Triassic-Jurassic extinction event
Cambrian
Eocene
suborder Ceratosaura
paleodistribution
coelophysis
vertebrate paleontology
genus Coelophysis
Thecodontia
rhynchosaur
order Thecodontia
faunachron
Hettangian
Cambrian period
paleoherpetology
paleohistorical
Rhyacian
Coniacian
Anapsida
Cenomanian
Paleolithic
subclass Anapsida
family Titanosauridae
order Rhynchocephalia
Sinemurian