一副有着两亿年历史、来自于一种和恐龙、鳄鱼同类的动物的牙齿,让人看到了蛇的毒牙是如何进化的。它们证实了这样的想法,那就是毒牙里喷毒液的孔道是由牙齿表面的沟槽进化而来的。这种三叠纪晚期的爬行动物Uatchitodon之所以为人所知只是因为它的牙齿,这些牙齿类似于鳄鱼或恐龙的锯齿状长牙。人们已经发现了几颗这样的牙齿,有两颗形成年代最晚的距今已有2.2亿年了,上面有一些痕迹看似毒液通道。在一副更为古老的牙齿 With a history of 200 million years, the teeth of an animal of the same type as dinosaurs and crocodiles show how the snake’s fangs have evolved. They confirmed the idea that the channels of the spray in the fangs evolved from grooves in the tooth surface. This late Triassic reptile, Uatchitodon, is known only for its teeth, which are similar to jagged teeth of crocodiles or dinosaurs. People have found several such teeth, two of the oldest since the formation of 220 million years ago, there are some traces of seeming venom channel. In a more ancient teeth