One of the new species is a type of ancient mammal called a shuotheriid, discovered in a Middle Jurassic fossil site in Mongolia ... of ancient mammal called Morganucodon. Both of these new ...

Morganucodon (above), from the Jurassic Period of Earth History about the size of the ancestors of most mammals from the Age of Dinosaurs and modern mammals. Both Varanosaurus and Morganucodon fed ...