大家都知道,恐龙是生物史上最引人注目的已绝灭的爬行动物。它们在晚三叠世(距今约二亿三千万年)由假鳄类演化出,一直生活到距今约六千五百万年的晚白垩世。在此期间,它们几乎占据了地球上的所有空间,加上鱼龙类和翼龙类,这些爬行动物统治着中生代陆水空三大生态领域。故此,中生代又称“恐龙 As we all know, dinosaurs are the most striking extinct reptiles in the history of biology. They evolved from false crocodiles in the late Triassic (about 230 million years ago) to life in the late Cretaceous about 65 million years old. In the meantime, they occupied almost all of the earth’s space, plus the Ichneumon and the Pterosaurs, which dominate the three major ecological fields of Mesozoic water and air. Therefore, Mesozoic also known as "dinosaurs