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单词 psittacosaurus
释义

psittacosaurus

enUK
Thesaurus
Noun1.psittacosaurus - primitive dinosaur actually lacking horns and having only the beginning of a frillpsittacosaurus - primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedalpsittacosaurceratopsian, horned dinosaur - any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongoliagenus Psittacosaurus - most primitive genus of horned dinosaurs; early Cretaceous

Psittacosaurus

enUK

Psittacosaurus

 

a genus of extinct Early Cretaceous reptiles of the order Ornithischia. The animals measured 1–1.5 m in length and were marked by bipedal locomotion. Their taxonomic position is debatable: the shape of their skull resembles that of Ceratopsia, their teeth resemble those of Ankylosauria, and the structure of the limbs resembles that of Ornithopoda. Psittacosaurus most probably represent a branch of the Stegosauria—Ankylosauria that retained bipedal locomotion. The small, serrate teeth apparently made it possible to gnaw and grind hard plants. The hooflike phalanges are evidence of adaptation to walking on muddy ground. The reptiles evidently lived along shores in thickets, where it was easy to find food and hide from enemies.

psittacosaurus

enUK
  • noun

Synonyms for psittacosaurus

noun primitive dinosaur actually lacking horns and having only the beginning of a frill

Synonyms

  • psittacosaur

Related Words

  • ceratopsian
  • horned dinosaur
  • genus Psittacosaurus
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