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The answer depends on the subjects "Preservation potential".

This in turn, depends on a number of factors:

durable body parts:- teeth, bone, shell...

where they died: on a cliff top has lower potential than the sea floor

What their life mode was: burrowing animals have a higher potential than flying ones...

So- the ultimate is: a hard shelled burrowing animal that lives in the sea...

Hence the dominance in the fossil record of sea living, hard shelled invertebrates.

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15y ago

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