The famous Archaeopteryx – the first specimen of which resides in the Natural History Museum in London – for example, is one such transitional fossil between the reptiles and birds.

比如，伦敦自然历史博物馆第一个标本物种、著名的始祖鸟化石就是爬行动物和鸟类之间的过渡物种化石。

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The reptiles first appear in the fossil record around 98 million years ago, Wilson said.

Wilson说，这种爬行动物在化石记录里最早出现于9800万年前。

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