原始祖鸟(属名:Protarchaeopteryx)是火鸡大小的有羽毛恐龙,发现于中国。原始祖鸟的粗短尾巴上有保存良好的羽毛;它们的手部修长,上有3个指爪,具有腕骨。原始祖鸟的发现在鸟类起源的研究上具有更大的意义,因为它具有了真正的羽毛,在进化上比中华龙鸟更接近鸟。但是它比著名的产于德国的始祖鸟更加原始,因此起名叫做原始祖鸟。原始祖鸟的发现使得恐龙和鸟类之间的界限越来越模糊。
这就肯定了从另外两个过渡的生物化石archaeopteryx(始祖鸟,最古老的鸟类)和Rodhocetus(一种原始鲸)。
This confirms what has been observed in two other transitional fossils, Archaeopteryx (the oldest known bird) and Rodhocetus (a proto-whale).
科学家们说,据称是地球上最古老最原始的鸟类的“始祖鸟”可能根本就不是一只鸟。
Archaeopteryx, supposedly the oldest and most primitive bird on Earth, might not have been a bird after all, scientists say.
而这次始祖鸟化石的发现,比先前发现的鸟化石时代更早,层位更低,特征更加原始。
However, this find of archaeopteryx fossils are from a much earlier age, lower in stratus and more primitive in features than previously discovered archaeopteryx.
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