| Bone crushers first appeared among the creodonts, the first order of mammals to take over the land. |
| Brontotheres died out in the Earliest Oligocene, and creodonts died out outside Africa and the Middle East at the end of the period. |
| In addition, Indohyus, carnivores, and an archaic group of meat-eating mammals called creodonts were included. |
| Perhaps, this high ratio reflects the imperfectly carnivorous habits of the Paleocene creodonts as a group. |
| The slow clumsy creodonts, well adapted to the jungle thickets, were replaced by the swift intelligent cat and dog type carnivora as the dominant predators. |
| Creodonts are an extinct group of carnivorous mammals that were long thought to be the ancestors of modern Carnivora. |
