...The development of horns on the head provided a defensive form. The prototype is thought to be the Psittacosaurus , a herbivorous bipedal creature about 2m long discovered in Mongolia. It had a parrot-like beak and slight ceratopsian features on its head. *Some of the terminology that mentions "Psittacosaurus" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…頭部に角が生じることで防御形態を確立した。祖型はモンゴルで発見された体長2mほどの植食性二脚歩行のプシッタコサウルスPsittacosaurusと考えられている。オウムのようなくちばしをしており,頭部に角竜様の特徴がわずかにみられる。… ※「Psittacosaurus」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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