Diatryma (Gastornis gigantea): Eocene 55 MYA
Megistotherium osteothlastes: Miocene 23 MYA
Hyaenodon horridus: late Eocene-early Oligocene 42-16 MYA
Smilodon gracilis: Pleistocene
Andrewsarchus mongoliensis: Eocene 42-36 MYA
Amphicyon giganteus: Bear-dog: Oligocene to Miocene 16.8-7.2 MYA