I know the NCBI has a list of each species and their place in the evolutionary tree. But do they have the dates that these species existed? Does any such database (partial or complete) exist anywhere?

For example, Adelobasileus on Wikipedia says "about 225mya", so that would be one example date. Obviously they aren't super exact, but it would be cool if this has already been collected somewhere.

  • $\begingroup$ for the vast majority of species those will just be question marks. $\endgroup$ – John Dec 11 '20 at 6:44

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