恐龙
恐龙（学名：Dinosauria）是群中生代个多样化优势陆栖脊椎动物，支配全球陆地生态系超过1亿6千万年之久。恐龙最早出现勒2亿3千万年前个三叠纪，灭亡勒约6千5百万年前个白垩纪晚期所发生个白垩纪末灭绝事件。
 地质年代： 三迭纪晚期到白垩纪末期 （不包含鸟类个状况） | ||||||||||||||
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 暴龙（左）搭迷惑龙（右）个骨架 勒纽约美国自然历史博物馆 | ||||||||||||||
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