Burdigalian genus first appearances

Phorusrhacos ( ) is an extinct genus of giant flightless terror birds that inhabited South America during the Miocene epoch. Phorusrhacos was one of the dominant land predators in South America at the time it existed. It is thought to have lived in woodlands and grasslands.

thumb|left|Restoration of a Procranioceras. Procranioceras is an extinct genus of artiodactyl belonging to the family Dromomerycidae, which was endemic to North America. It lived during the Middle Miocene, 16.0—13.6 Ma, existing for approximately . Fossils have been found from Florida, Saskatchewan, and Nebraska.