#ornithischian_dinosaur__ornithischiandinosaur__ornithischian  herbivorous dinosaur with a pelvis like that of a bird
  supertype:  #dinosaur  any of numerous extinct terrestrial reptiles of the Mesozoic era
  member of:  #order_Ornithischia
  subtype:  #pisanosaur__pisanosaurus  primitive dinosaur found in Argentina
  subtype:  #staurikosaur__staurikosaurus  primitive dinosaur found in Brazil
  subtype:  #armored_dinosaur__armoreddinosaur  dinosaurs having bony armour
     subtype:  #stegosaur__stegosaurus__stegosauru__Stegosaur_stenops  herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
     subtype:  #ankylosaur__ankylosaurus  having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's
        subtype:  #Edmontonia  heavily armored and highly spiked dinosaur with semi-upright posture
  subtype:  #bone-headed_dinosaur  bipedal herbivorous dinosaurs with bony crowns
     subtype:  #pachycephalosaur__pachycephalosaurus  bipedal herbivore having 10 inches of bone atop its head; largest bone-headed dinosaur ever found
  subtype:  #ceratopsian__horned_dinosaur  any of several four-footed herbivorous horned dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
     subtype:  #protoceratops__protoceratop  small horned dinosaur
     subtype:  #triceratops__triceratop  huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill
     subtype:  #styracosaur__styracosaurus__styracosauru  an unusual ceratopsian dinosaur having many large spikes around the edge of its bony frill and a long nose horn; late Cretaceous
     subtype:  #psittacosaur__psittacosaurus  primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind and short front limbs; may have been bipedal
  subtype:  #ornithopod_dinosaur__ornithopod  bipedal herbivorous dinosaur
  subtype:  #hadrosaur__hadrosaurus__hadrosauru__duck-billed_dinosaur  any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
     subtype:  #anatotitan  one of the largest and most famous duck-billed dinosaurs
     subtype:  #corythosaur__corythosaurus__corythosauru  duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
     subtype:  #edmontosaurus__edmontosauru  duck-billed dinosaur from Canada found as a fossilized mummy with skin
     subtype:  #trachodon__trachodont  large duck-billed dinosaur of the Upper Cretaceous

No statement uses or specializes #ornithischian_dinosaur; click here to add one.