All Todays Prehistoric Cenozoic Animals

All Todays Prehistoric Cenozoic Animals are a group of formerly fictional outdated-looking animals that were brought from the DeviantArt series, All Todays, into real life North America.

All Todays Prehistoric Cenozoic Animal's Description
During the early days of the Cenozoic era, one group of (possibly reptilian) creatures called protomammals started to diversify and ranged from the tiny shrew, to the large elephant, to a massive indricothere, to the biggest of them all, a predatory flesh-eating blue whale. Here's the examples of some of these protomammals.

It is unknown why that the protomammals, along with most mammal species, had suddenly became extinct at the end of the Holocene period.