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may 15, 260000000 BC - Cynodonts

Description:

The mammalian ancestor was contained in the cynodont group. It had similar teeth, digestive and reproductive systems to what would eventually become mammals.

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Chordate Evolution over Geologic Time

ByZahur Ashrafuzzaman
26 Jan 2018
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Date:

may 15, 260000000 BC
Now
~ 5883516 years ago
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