Triassic-Jurassic extinction event
Triassic
Triassic period
Acadian
Devonian
Hettangian
mass extinction event
Jurassic
Permian period
order Ictodosauria
Ictodosauria
Permian
Cambrian period
Cambrian
dinosaur
Tonian
Jurassic period
Permian-Triassic extinction
Ordovician
Rhyacian
hylaeosaurus
Orosirian
Permian-Triassic mass extinction
Mesozoic
Great Dying
end-Cretaceous
genus Barosaurus
Cryogenian
Siderian
Ectasian
Ediacaran
mass extinction
semiextinction
Aegyptopithecus
Stenian
Callovian
Bathonian
Bajocian
Pliensbachian
apatosaur
apatosaurus
Kimmeridgian
thunder lizard
Toarcian
brontosaur
brontosaurus
Sinemurian
Apatosaurus excelsus
Carboniferous period
semiextinct
Coniacian
Paleogene
Statherian
Cenomanian
Carboniferous
Santonian
age of extinction
plesiosaur
subclass Synapsida
Synapsida
Edmontonian
Calymmian
Paleozoic
Neogene
paleopopulation
Miocene
Paleozoic era
Pleistocene
K-T boundary
archosaurian
end-Triassic mass extinction
palaeoecology
archosaur
archosaurian reptile
Aptian
nimravid
Pennsylvanian
Laramide
fossilism
Upper Carboniferous
finicretaceous
Mambawakale
Upper Carboniferous period
paleohabitat
Campanian
Cretaceous
Pennsylvanian period
Ordovician period
Wenlock
Therapsida
Carnian
order Therapsida
Eocene