End Ordovician, 444 million years ago, 86% of species lost.
Late Devonian, 375 million years ago, 75% of species lost.
End Permian, 251 million years ago, 96% of species lost.
End Triassic, 200 million years ago, 80% of species lost.
End Cretaceous, 66 million years ago, 76% of all species lost.
YIKES!
Who was tabulating ALL the species 444 million years ago to derive extinction and survival ratios?