Protoceratops andrewsi (ceratopsian dinosaur) (Djadokhta Formation, Upper Cretaceous; Flaming Cliffs, Gobi Desert, Mongolia) 2 : 無料・フリー素材/写真
Protoceratops andrewsi (ceratopsian dinosaur) (Djadokhta Formation, Upper Cretaceous; Flaming Cliffs, Gobi Desert, Mongolia) 2 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Protoceratops andrewsi Granger & Gregory, 1923 - fossil ceratopsian dinosaur skull from the Cretaceous of Mongolia. (replica of an AMNH specimen, American Museum of Natural History, New York City, New York State, USA)Ceratopsians are the "horned dinosaurs". They were large, quadrupedal, herbivorous dinosaurs having a beaked skull and a frill - an extension of bone behind the skull that partially covered the neck. Ceratopsian dinosaurs are known from the Jurassic and Cretaceous. The last members of the group died out at the Cretaceous-Tertiary boundary, 65 million years ago.Seen here is a Protoceratops andrewsi skull from the Cretaceous of Mongolia's Gobi Desert - this type of certaopsian lacked facial horns. The openings in the frill are called fenestra - their presence reduced the weight of the skull.Classification: Animalia, Chordata, Vertebrata, Reptilia, Archosauria, Dinosauria, Ornithischia, Marginocephalia, Ceratopsia, ProtoceratopsidaeStratigraphy: Djadokhta Formation, Campanian Stage, upper Upper CretaceousLocality: Flaming Cliffs, Gobi Desert, southern Mongolia-------------------------------------Info. at:en.wikipedia.org/wiki/Protoceratops |
| 撮影日 | 2023-04-02 09:05:14 |
| 撮影者 | James St. John |
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