| 释义 |
Ornithischia
Thesaurus| Noun | 1. | Ornithischia - extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)order Ornithischiaanimal order - the order of animalsArchosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodontsornithischian, ornithischian dinosaur - herbivorous dinosaur with a pelvis like that of a birdgenus Pisanosaurus - primitive ornithischian dinosaur found in Argentina; early Triassicgenus Staurikosaurus - primitive ornithischian dinosaur found in Brazilsuborder Thyreophora, Thyreophora, thyreophoran - armored dinosaurs: stegosaurs and ankylosaursMarginocephalia, marginocephalian, suborder Marginocephalia - includes boneheaded (pachycephalosaurs) and horned (ceratopsian) dinosaurseuronithopod, Euronithopoda, Ornithopoda, suborder Euronithopoda, suborder Ornithopoda - widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon) |
Ornithischia
Ornithischia[‚ȯr·nə′this·kē·ə] (paleontology) An order of extinct terrestrial reptiles, popularly known as dinosaurs; distinguished by a four-pronged pelvis, and a median, toothless predentary bone at the front of the lower jaw. Ornithischia an order of fossil reptiles of the superorder Dinosauria. The pubic bone of the tetraradiate pelvis had a developed posterior appendage (as in birds). The anterior, toothless part of the jaws was clad in a horny jacket and resembled a bill. The teeth were laterally compressed, with leaflike crowns. The distal phalanges of the digits in late ornithischians were flattened into hooves. The reptiles were herbivorous, with the earliest ones possibly being omnivorous. Many possessed defensive adaptations in the form of cutaneous scutella, spines, or horns. There were six (or four) suborders, including Stegosau-ria, Ankylosauria, and Ceratopsia. Ornithischians lived in the Jurassic and Cretaceous periods. Ornithischia
Ornithischia a large herbivorous order of dinosaurs, most of which were bipedal. They were characterized by a bird-like pelvic girdle, which possessed a postpubic bone stretching on each side below the ischium.Ornithischia
Related to Ornithischia: SaurischiaSynonyms for Ornithischianoun extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans)SynonymsRelated Words- animal order
- Archosauria
- subclass Archosauria
- ornithischian
- ornithischian dinosaur
- genus Pisanosaurus
- genus Staurikosaurus
- suborder Thyreophora
- Thyreophora
- thyreophoran
- Marginocephalia
- marginocephalian
- suborder Marginocephalia
- euronithopod
- Euronithopoda
- Ornithopoda
- suborder Euronithopoda
- suborder Ornithopoda
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