0 104 Ornithischia TI 7/24/2003 0 In millions of years 0 0 BC 200 Four types Four types of Ornithischia:_enter__enter_ 0 0 BC 200 Ankylosaurs Ankylosaurs: Curved Lizard_enter__enter_ 0 0 BC 200 Stegosaurs Stegosaurs: Plated Lizard_enter__enter_ 0 0 BC 200 Ceratopsians Ceratopsians: Horned Dinosaur_enter__enter_ 0 0 BC 200 Ornithopods Ornithopods: Duck Billed_enter__enter_ 0 0 BC 160 Camptosaurus Camptosaurus-"Bent Lizard" _enter__enter_Ornithopod_enter__enter_ 0 0 BC 155 Nanosaurus Nanosaurus-"Dwarf Lizard"_enter__enter_Ornithopod_enter__enter_ 0 0 BC 150 Stegosaurus Stegosaurus-"Plated Lizard"_enter__enter_Stegosaur_enter__enter__enter_ 0 0 BC 141 Othnielia Othnielia (Laosaurus)-"Fossil Lizard"_enter__enter_Ornithopod_enter__enter__enter_ 0 0 BC 140 Dryosaurus Dryosaurus-"Oak Lizard"_enter__enter_Ornithopod_enter__enter_ 0 0 BC 132 Nodosaurus Nodosaurus-"Toothless Lizard"_enter__enter_Ankylosaur_enter__enter__enter_ 0 0 BC 130 Panoplosaurus Panoplosaurus-"Armored Lizard"_enter__enter_Ankylosaur_enter__enter__enter_ 0 0 BC 130 Iguanodon Iguanodon-"Iguana-Tooth"_enter__enter_Ornithopod_enter__enter__enter_ 0 0 BC 128 Euoplocephalus Euoplocephalus-"Well-protected Head"_enter__enter_Ankylosaur_enter__enter__enter_ 0 0 BC 127 Stegoceras Stegoceras-"Covered Horn"_enter__enter_Ornithopod_enter__enter_ 0 0 BC 116 Tenontosaurus Tenontosaurus-"Tendon Lizard"_enter__enter_Ornithopod_enter__enter__enter_ 0 0 BC 100 Hadrosaurus Hadrosaurus-"Bulky Lizard"_enter__enter_Ornithopod_enter__enter_ 0 0 BC 89 Leptoceratops Leptoceratops-"Slender-horned Face"_enter__enter_Ceratopsian_enter__enter__enter_ 0 0 BC 88 Monoclonius Monoclonius-"Single-horned"_enter__enter_Ceratopsian_enter__enter_ 0 0 BC 87 Styracosaurus Styracosaurus-"Spiked Lizard"_enter__enter_Ceratopsian_enter__enter__enter_ 0 0 BC 86 Triceratops Triceratops-"Three-horned Face"_enter__enter_Ceratopsian_enter__enter__enter_