蜥龙类。脊椎动物,古爬行动物的1个目。骨盆的结构与蜥蜴的骨盆近似,故称蜥龙类。本类包括蜥脚类和兽脚类两亚目。生存于三叠纪至白垩纪。种类较多,如梁龙、雷龙、霸王龙以及中国的马门溪龙、禄丰龙等均属蜥龙类。
鸟类的所有直系祖先也属于蜥龙类。
The Saurischia also include all the immediate ancestors of birds.
另一个则是蜥龙类,其中有很出名的梁龙和暴龙,同时蜥龙类中也有鸟类的直系祖先。
The other is the Saurischia, whose famous members include Diplodocus and Tyrannosaurus. The Saurischia also include all the immediate ancestors of birds.
现在,鸟笼类和蜥龙类的进化分离要回溯到恐龙诞生的最初期,也就是在鸟类出现的8亿年前和在孔子天宇龙出现的大约100年。
Yet the split between Ornithischia and Saurischia goes back to the very beginning of the dinosaurs, 80m years before the first birds and about 100m years before T. confuciusi.
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