Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Avemetatarsalia Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Scleromochlus
Pterosauria Ornithodira Lagerpetidae
Marasuchus Dinosauromorpha Genasauria Silesauridae
Neornithsichia Nyasasaurus Dinosauriformes Thyreophora Ornithischia Eocursor ? Heterodontosauridae
Pisanosaurus Dinosauria Sauropodomorpha
Herrerasauria Saurischia
Eodromaeus Theropoda Daemonosaurus
Tawa
Neotheropoda Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Cerapoda Ornithopoda
Marginocephalia Eocursor Parksosauridae Laquintasaura Kulindadromeus
Othnielosaurus Jeholosauridae Neornithischia
Leaellynasaura
Hexinlusaurus
Agilisaurus Stegosauridae
Lesothosaurus Stegosaurinae Stegosauria Dacentrurinae
Kentrosaurus
Tuojiangosaurus
Thyreophoroidea Struthiosaurinae Genasauria Huayangosauridae Eurypoda Gigantspinosaurus Panoplosaurinae Nodosauridae Sauropelta
Polacanthinae
Scelidosaurus Gargoyleosaurus Ankylosauridae
Thyreophora Scutellosaurus Kunbarrasaurus
Ankylosauria Hylaeosurus Shamosaurinae Ankylosaurinae Pinacosaurus
Tianchiasaurus Ankylosaurini Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous Euhadrosauria
Early Middle Late Early Middle Late Early Late
Hadrosaurinae Hadrosauridae
Hadrosauromorpha Lambeosaurinae Eotrachodon Tethyshadros Hadrosauriformes Hadrosauria Telmatosaurus
Bactrosaurus
Protohadros
Styracosterna Eolambia
Ankylopollexia Probactrosaurus
Dryomorpha Iguanodontidae
Iguanacolossus Theiophytalia
Camptosaurus Iguanodontia Dryosauridae Rhabdodontomorpha Tenontosaurus
Ornithopoda Muttaburrasaurus
Rhabdodontidae
Cerapoda Gondwanan Ornithopod Radiation
Hypsilophodon
Marginocephalia Thescelosaurinae Thescelosaurus
Parksosauridae Elasmaria
Parksosaurus Changchunsaurus
Orodrominae Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Ornithopoda Cerapoda Pachycephalosauria Pachycephalosauridae
Marginocephalia Stenopelix
Yinlong
Chaoyangsauridae Ceratopsia Psittacosauridae
Liaoceratops
Neoceratopsia Aquilops
Archaeoceratops
Leptoceratopsidae
Graciliceratops
Protoceratopsidae Coronosauria
Zuniceratops Ceratopsoidea
Centrosaurinae Ceratopsidae
Chasmosaurinae Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Neosauropoda
Turiasauria Eusauropoda Jobaria Mamenchisauridae Gravisauria Cetiosauridae
Shunosaurus Sauropoda Spinophorosaurus Vulcanodontidae
Pulanesaura Anchisauria Antetonitrus + Lessemsaurus
Melanorosauridae
Massopoda Aardonyx Anchisaurus Yunnanosaurus Plateosauria
Massospondylidae
Plateosauridae
Riojasauridae
Plateosauravus Efraasia Thecodontosaurus Sauropodomorpha Pantydraco
Saturnaliidae
Eoraptor
Panphagia Saurischia
Theropoda Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late Eutitanosauria Lithostrotia
Saltasauridae
Titanosauria Aeolosauridae
Malawisaurus
Andesauroidea Somphospondyli “chubutisaurs” Titanosauriformes Euhelopodide
Sauroposeidon
Astrodon Macronaria
Brachiosauridae
Neosauropoda Camarasauridae
Bellusaurus Flagellicaudata Diplodocidae
Diplodocinae
Apatosaurinae Diplodocoidea
Dicraeosauridae
Rebbachisauridae
Jobaria Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Tawa
Coelophysoidea
Dilophosauridae
Neotheropoda Tachiraptor
Ceratosauria Berberosaurus Ceratosauridae
Abelisauridae Neoceratosauria Abelisauroidea Noasauridae Noasaurinae
Elaphrosaurinae ? Averostra Monolophosaurus Megalosauria Chilesaurus
Spinosauridae Tetanurae Megalosauroidea Megalosauridae
Piatnitzkysauridae Bahariasauridae
Metriacanthosauridae
Carnosauria Allosauridae ? Orionides Veterupristisaurus Allosauria
Carcharodontosauria Carcharodontosauridae
Neovenator Avetheropoda
venatoridae Neo- Chilantaisaurus Megaraptora ? Coelurosauria Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Carnosauria Bicentenaria Avetheropoda Tyrannosauridae
Bistahieversor
Tyrannosauroidea Appalachiosaurus Dryptosaurus
Coelurosauria Xiongguanlong “stokesosaurs” Dilong Proceratosauridae
Coeluridae
Tyrannoraptora Ornitholestes Compsognathidae sauria Ornithomimo Nqwebasaurus Pelecanimimus
Harpymimusoidea Ornithomim- Deinocheiridae Maniraptoriformes - Ornithomimidae Eshanosaurus
Therizinosauria Falcarius Therizinosauroidea Beipiaosaurus Therizinosauridae Alvarezsauridae
Maniraptora Haplocheirus Alvarezsaurus Alvarezsauria Patagonykus Oviraptorosauria
Parvicursorinae Incisivosaurus
Caudipteridae Pennaraptora Caenagnathidae oidea gnath- Caena-
Scansoriopterygidae Oviraptoridae Eumaniraptora Millions of Years Ago 252.17 247.2 237.0 201.3 174.1 163.5 145.0 100.5 66.0
Triassic Jurassic Cretaceous
Early Middle Late Early Middle Late Early Late
Oviraptorosauria
Scansoriopterygidae Troodontinae
Jinfengopteryginae
Anchiornis Pennaraptora Unenlagiinae
Microraptorinae Dromaeosauridae Saurornitholestinae Eudromaeosauria
Deinonychus Atrociraptor Eumaniraptora Velociraptorinae
Dromaeosaurinae
Archaeopteryx Jeholornis Balaur Avialae Omnivoropterygidae Confuciusornithidae Pygostylia Enantiornithes
Archaeorhynchus
Ornithothoraces Patagopteryx
Euornithes Yanornithiformes Ichthyornis
Hesperonithes Carinatae Palaeognathae Ornithurae
GalloanseraeNeognathae Aves
Neoaves