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脊椎動物化石 哺乳動物 概論

脊椎動物化石 哺乳動物 概論

the Triassic Period. Their ancestors can be traced back to a group of mammal-like reptiles that emerged.....more

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哺乳動物化石異型齒

哺乳動物化石異型齒

. They are an unusual branch of the Mammalian Family that devolved back to homodonts (Odontoceti) or even.....more

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象的演化

象的演化

. Elephants trace their ancestry back to the Moeritherium that appeared 55 million years ago.....more

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中文名:古菱齒象

was ground to the diamond shape. The last teeth in the back of upper and lower jaws had the thickness.....more

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中文名:苑裡偽虎鯨

back to at least a million years, these animals are believed to be an unrecorded new species.....more

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