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order Ornithischia

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Noun

1.

order Ornithischia - extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)

animal order - the order of animals

Archosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts

ornithischian, ornithischian dinosaur - herbivorous dinosaur with a pelvis like that of a bird

genus Pisanosaurus - primitive ornithischian dinosaur found in Argentina; early Triassic

genus Staurikosaurus - primitive ornithischian dinosaur found in Brazil

suborder Thyreophora, Thyreophora, thyreophoran - armored dinosaurs: stegosaurs and ankylosaurs

Marginocephalia, marginocephalian, suborder Marginocephalia - includes boneheaded (pachycephalosaurs) and horned (ceratopsian) dinosaurs

euronithopod, Euronithopoda, Ornithopoda, suborder Euronithopoda, suborder Ornithopoda - widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)

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genus Pisanosaurus
genus Staurikosaurus

Marginocephalia
marginocephalian

ornithischian
suborder Marginocephalia

suborder Thyreophora
Thyreophora

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