If enhydriodon appeared in prehistoric planet Ice age and the animal lived in the Hadar formation(the Same formation as australopithecus did) so Why didn't It appeared in Walking with beasts or Walking with cavemen at all?
Video captured by @brushbuck_tours on IG. Source.
I am specifically asking for placental mammals that lived throughout the late cretaceous, meaning that they had already existed for quiet a while before extinction event and continued to survive well into the cenozoic. I already know about purgatorius and some species of Multituberculates, but I am more interested in the rodent like placental mammals that lived inside holes much like modern day rats and mice.
Can you give me specific examples of such mammal species that meet these criteria? You get bonus points if you can name one that is a potential (or confirmed) ancestor of any mordern mammals that still exsit to this day. Please don't name the same species twice unless you can provide additional info on them.
I also accept links to any sources that can provide me with answers.