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| ORDER | SUBORDER | INFRA- ORDER |
DINOSAUR FAMILY | SOME GENERA | TIME RANGE | SIZE RANGE |
| S A U R I S C H I A N S S A U R I S C H I A N S S A U R I S C H I A N S |
THEROPODS Bipedal predators THEROPODS Bipedal predators THEROPODS Bipedal predators |
Herrerasauria | Saltopodidae (leaping feet) | Saltopus, Eoraptor | late Triassic | 2-3 feet (0.7-1 m) long |
| Staurikosaurids (Southern Cross lizards) | Staurikosaurus | late Triassic | 6.5-10 feet (2-3 m) long | |||
| Herrerasaurids (Herrera lizards) | Herrerasaurus | late Triassic to early Jurassic | 7-10 feet (2-3 m) long or more | |||
| Ceratosauria | Coelophysids (hollow form) | Coelophysis, Saltopus | late Triassic to early Jurassic | 2-10 feet (0.6-3 m) long | ||
| Ceratosaurids (horned lizards) | CeratosaurusSyntarsus | Early-Late Cretaceous | 11.5-20 feet (3.5-6 m) long | |||
| Podokesaurids (swift-footed lizards) | Podokesaurus, Syntarsus | Early-Late Jurassic | 3-10 feet (1-3 m) long | |||
| Abelisaurids (Abel's lizard) | Abelisaurus, Indosaurus | Early-Late Cretaceous | up to 36 feet (11 m) long | |||
| Noasaurids (lizards from NW Argentina) | Noasaurus | Late Cretaceous | 8 feet (2.4 m) long | |||
| Segisauridae (Segi Canyon Arizona lizards) | Segisaurus, Dilophosaurus | late Triassic to Early Jurassic | 20 feet (6 m) long | |||
| Coelurosauria | Coelurids (hollow tails) | Coelurus, Ornitholestes | Late Jurassic to Late Cretaceous | 4-8 feet (1.2-2.4 m) long | ||
| Dryptosaurids (wounding lizards) | Dryptosaurus | Late Cretaceous | +20 feet (6 m) long | |||
| Compsognathids (pretty jaw) | Compsognathus | late Jurassic to early Cretaceous | 2-3 feet (0.6-0.9 m) long | |||
| Oviraptors (egg thieves) | Oviraptor | Late Cretaceous | 6 feet (1.8 m) long | |||
| Caenagnathids (recent jawless) | Caenagnathus, Microvenator | Late Jurassic to Late Cretaceous | 7 feet (2 m) long | |||
| Avimimids (bird mimics) | Avimimus | Late Cretaceous | 5 feet (1.5 m) long | |||
| Ornithomimids (bird mimics) | Ornithomimus | Late Jurassic to Late Cretaceous | 11.5-19.5 feet (3.5-6 m) long | |||
| Garudimimids (Garuda mimics) | Garudimimus, Harpymimus | Mid-Late Cretaceous | 11.6 feet (3.5 m) long | |||
| Deinocherids (terrible hands) | Deinocheirus | Late Cretaceous | 45 feet (13.5 m) long (unsure - from incomplete fossils) | |||
| Dromaeosaurids (running lizards) | Caudipteryx, Deinonychus, Dromaeosaurus, Protarchaeopteryx, Sinornithosaurus, Sinosauropteryx, Unenlagia, Utahraptor, Velociraptor | Mid-Jurassic to Late Cretaceous | 6-13 feet (1.8-4 m) long | |||
| Troödontids (wounding teeth) | Troödon | Late Cretaceous | 6.6 feet (2 m) long | |||
| Tyrannosaurids (tyrant lizards) | Tyrannosaurus, Albertosaurus, Nanotyrannus | Late Cretaceous | 16-40 feet (5-12 m) long | |||
| Carnosauria | Allosaurids (different lizards) | Allosaurus, Yangchuanosaurus | Late Jurassic | 33-42 feet (10-12.8 m) long | ||
| Carcharodontosaurids (horned lizards) | Carcharodontosaurus, Giganotosaurus | Mid - Late Cretaceous | 40+ feet (12 m) long | |||
| Spinosaurids (thorn lizards) | Spinosaurus, Suchomimus | Late Jurassic to Late Cretaceous | 50 feet (15 m) long | |||
| Baryonychids (heavy claws) | Baryonyx | Early Cretaceous | 30 feet (9 m) long | |||
| Megalosaurids (giant lizards) | Megalosaurus, Altispinax, Erectopus | Late Jurassic to Late Cretaceous | 23-30 feet (7-9 m) long | |||
| Segnosauria | Therizinosaurids (scythe lizards) | Therizinosaurus | Late Cretaceous | 35 feet (10.7 m) long | ||
| Segnosaurids (slow lizards) | Segnosaurus | Late Cretaceous | 16-30 feet (5-9 m) long | |||
| SAUROPODS Quadrupedal herbivores |
Prosauropoda | Anchisaurids (near lizards) | Anchisaurus | Mid-Triassic- Early Jurassic | 7-10 feet (2-3 m) long | |
| Plateosaurids (flat lizards) | Plateosaurus, Mussaurus | late Triassic - Early Jurassic | 5-26 feet (1.5-8 m) long | |||
| Melanorosaurids (black mountain lizard) | Melanorosaurus, Riojasaurus | late Triassic- Early Jurassic | 19-40 feet (6-12 m) long | |||
| Massospondylidae (black mountain lizard) | Massospondylus | late Triassic to Early Jurassic | 13 feet (4 m) long | |||
| Sauropoda | Cetiosaurids (whale lizards) | Cetiosaurus, Protognathus | Late Jurassic to Late Cretaceous | . | ||
| Camarasaurids (chambered lizards) | Camarasaurus | Late Jurassic to Late Cretaceous | 40-60 feet (12-18 m) long | |||
| Dicraeosaurids (two-forked lizards) | Amargasaurus, Dicraeosaurus, Rebbachisaurus | Late Jurassic-Early Cretaceous | 33-28 feet (10-20 m) long | |||
| Euhelopodids (good marsh feet) | Euhelopus, Tienshanosaurus | Late Jurassic | 33-90 feet (10-27 m) long | |||
| Titanosaurids (titanic lizards) | Aegyptosaurus, Alamosaurus, Andesaurus, Argentinosaurus, Hypselosaurus, Quaesitosaurus, Saltasaurus, Titanosaurus | Late Jurassic to Late Cretaceous | 30-70 feet (9-21 m) long | |||
| Diplodocids (double-beamed form) | Diplodocus, Apatosaurus, Barosaurus, Supersaurus, Seismosaurus | Late Jurassic to Late Cretaceous | 54-90 feet (16.5-27 m) long | |||
| Brachiosaurids (arm lizards) | Astrodon, Brachiosaurus, Ultrasauros | Mid-Late Jurassic- Early Cretaceous | 33-82 feet (10-25 m) long | |||
| O R N I T H I S C H I A N S O R N I T H I S C H I A N S |
ORNITH- OPODS herbivores |
Fabrosauria, Lesotho- sauria |
Fabrosaurids (Fabre's lizards) | Fabrosaurus, Lesothosaurus, Xiaosaurus | late Triassic to Early Jurassic | 3.3 feet (1 m) long |
| Heterodontosaurids (different-teeth lizards) | Heterodontosaurus | late Triassic to Early Jurassic | 4 feet (1.2 m) long | |||
| Ornithopoda | Hypsilophodontids (high-ridged teeth) | Hypsilophodon, Orodromeus | Mid-Jurassic to Late Cretaceous | 3-8 feet (0.9-2.4 m) long | ||
| Dryosaurids (oak lizards) | Dryosaurus | Mid-Jurassic to Early Cretaceous | 9-21 feet (2.7-6.5 m) long | |||
| Iguanodontids (iguana teeth) | Iguanodon, Ouranosaurus, Anoplosaurus | Early- Late Cretaceous | 13.5-29 feet (4-9 m) long | |||
| Camptosaurids (bent lizards) | Camptosaurus, Muttaburrasaurus | Mid-Jurassic to Late Cretaceous | 4-23 feet (1.2-7 m) long | |||
| Hadrosaurids (big lizards) | Hadrosaurus, Maiasaura, Anatotitan, Edmontosaurus, Saurolophus, Trachodon | Late Cretaceous | 12-50 feet (3.7-15 m) long | |||
| Lambeosaurids (Lambe's lizard) | Lambeosaurus, Bactrosaurus, Corythosaurus, Jaxartosaurus, Parasaurolophus | Late Cretaceous | 13-50 feet (4-15 m) long | |||
| Thescelosaurids (wonderful lizards) | Thescelosaurus | Late Cretaceous | 11 feet (3.4 m) long | |||
| MARGINO- CEPHALIA herbivores |
Pachycephalo- sauria |
Pachycephalosaurids (thick-headed lizards) | Pachycephalosaurus, Stegoceras, Stygimoloch | Early - Late Cretaceous | 3-15 feet (0.9-4.6 m) long | |
| Homalocephalids (even-headed forms) | Wannanosaurus | Late Cretaceous | 1.5-10 feet (0.5-3 m) long | |||
| Ceratopsia | Protoceratopsids (first horned faces) | Protoceratops, Bagaceratops, Leptoceratops, Montanoceratops, Notoceratops, Zuniceratops | Late Cretaceous | 3.3-10 feet (1-3 m) long | ||
| Ceratopsidae (horned faces) | Anchiceratops, Avaceratops, Arrhinoceratops, Brachyceratops, Ceratops, Monoclonius, Styracosaurus, Torosaurus, Triceratops | Late Cretaceous | 6-30 feet (1.8-9 m) long | |||
| Psittacosaurids (parrot lizards) | Psittacosaurus | Early Cretaceous | 6.5 feet (2 m) long | |||
| THYREO- PHORA (ENOPLA- SAURIA) armored, herbivorous, quadrupeds |
x | Scutellosaurids (small-shield lizard) | Scutellosaurus | Early Jurassic to Late Jurassic | 2.4 feet (0.6-1.2 m) long | |
| Scelidosaurids (limb lizards) | Scelidosaurus | Early Jurassic | 13 feet (4 m) long | |||
| Stegosauria | Huayangosaurids (Huayang lizards) | Huayangosaurus, Tatisaurus | Mid-Jurassic | 13 feet (4 m) long | ||
| Stegosaurinae (roof lizards) | Stegosaurus, Dacentrurus, Kentrosaurus, Tuojiangosaurus, Yingshanosaurus | Late Cretaceous | 13-30 feet (3-9 m) long | Stegosauridae (roof lizards) | Craterosaurus, Regnosaurus | Early Cretaceous | 13 feet (4 m) long |
| Ankylosauria | Nodosaurids (node lizards) | Nodosaurus, Acanthopholis, Brachyspondosaurus, Edmontonia, Hoplitosaurus, Minmi, Hylaeosaurus, Polacanthus, Sauropelta, Struthiosaurus | Mid-Jurassic - Late Cretaceous | 6-25 feet (1.8-7.6 m) long | ||
| Ankylosaurids (fused lizards) | Ankylosaurus, Euoplocephalus, Tarchia, Talarurus | Early - Late Cretaceous | 18-35 feet (5.5-10.7 m) long |
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