The Evolutionists are always looking for the missing link and missing it.
Paleontologists are the folks who dig in the earth to find fossils of creatures long extinct. They also classify the bones according to families, genus-es & species. Based on their findings, they tell us that something like 99% of all species which ever existed have gone extinct.
I don't know the number of extinct species they've identified, but it's at least hundreds, probably thousands.
And EVERY ONE OF THEM could, in some sense, be called a "missing link." Of course, now that it's found and identified, it's no longer "missing" is it? ;-)