摘要
鸟类是现今最为繁盛的一支陆生脊椎动物，已知9200多种。鸟类是怎样从1．5亿年前的始祖鸟进化成为我们头上飞翔的鸟类，这是古生物研究的重大课题。
The Aves are the first batch of terrestrial vertebrate including more than 9200 kinds. How did the present birds evolve from archaeopteryx about 150 million years ago？ It was a fatal subject for study of ancient extinct life.
出处
《今日辽宁》
2009年第3期20-23,共4页
Liaoning Today
