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Re: number of species of dinos
> What percentage of the total ecosystem are fossilized?
A vanishingly small percentage.
I once estimated (conservatively) that at least a *trillion* individuals
of Triceratops existed over the span of the genus. We have remains
of some hundred or so individuals, if you include isolated leg bones
and the like.
> What percentage of
> the possible fossils to find have been found?
Almost certainly less than half, probably less than a quarter.
The peace of God be with you.