Jurassic period
Jurassic
Triassic
Triassic period
Permian
Permian period
Carboniferous
Carboniferous period
coelophysis
suborder Ceratosaura
hylaeosaurus
Quaternary period
Ictodosauria
suborder Prosauropoda
Ectasian
Age of Man
Prosauropoda
order Ictodosauria
Quaternary
genus Coelophysis
Statherian
Calymmian
Hettangian
Cretaceous
Cretaceous period
genus Ceratosaurus
Stenian
dinosaur
pre-Jurassic
Triassic-Jurassic extinction event
Cenozoic
New Stone Age
Upper Carboniferous
Cenozoic era
Pennsylvanian period
Pennsylvanian
Upper Carboniferous period
Age of Mammals
Cryogenian
Siderian
finicretaceous
suborder Pachycephalosaurus
Mesozoic
Sinemurian
Toarcian
Callovian
Tertiary
Rhyacian
Pliensbachian
Tertiary period
Kimmeridgian
Bajocian
Bathonian
paleoconnection
ceratopsian
horned dinosaur
paleochronology
Paleogenic
Orosirian
paleosource
rhynchosaur
genus Barosaurus
Tonian
dinosauric
suborder Sauropoda
titanosauriform
Aegyptopithecus
Age of Reptiles
Mesozoic era
Sauropoda
Lower Carboniferous period
Mesolithic Age
Mississippian
Paleogene
Theropoda
C15
Mesolithic
Lower Carboniferous
Missippian period
neornithischian
palaeobiocoenosis
Epipaleolithic
suborder Theropoda
Phanerozoic
Paleozoic era
Phanerozoic aeon
Phanerozoic eon
C16
Paleozoic
genus Apatosaurus
genus Brontosaurus
trachodont
neotheropod
palaeoichnologic
Gideon Algernon Mantell
Neoarchean
trachodon