Elephant shrews are sometimes considered to be living fossils, and their origin is believed to go back 57.5 million years in the Paleocene.
So much about the congruence of anatomical and genetic similarity predicted by Darwin’s theory.
Coelacanths are considered to be “living fossils,” which do not sit well with Darwinian assumptions.
All orders and families of the angiosperms appear abruptly in the fossil record (the same for most lower systematic categories).
The tuatara genome is 5GB, making it enormous relative to other vertebrates — and full of surprises.