Purgatoris, before getting snatched by a raptor.
Purgatoris is an early primate that lived on earth in the late cretaceous - early Paleocene. It is the size of a rodent.
Doomsday
Purgatoris is often being preyed on by raptors and troodonts, but when the asteroid hits the earth, purgatoris hide in their burrows, eating insects, worms and roots.
Panic in the sky
Purgatoris survived the extinction along with other mammals, and now rules the world.