|Named By:||Bertelli et al. in 2007|
|Time Period:||Miocene, 15 Ma|
|Size:||Between 2.28 and 3 meters tall. Skull is 71 centimetres long (45.7 centimetres of which is beak)|
|Fossil(s):||Almost complete skull with tarsometatarsus (foot bone adapted to extend the length of the lower leg) and toe bone|
|Classification:||| Chordata | Aves | Cariamae | Phorusrhacidae | Phorusrhacinae ||
Kelenken guillermoi was a species of giant flightless predatory birds of the extinct family Phorusrhacidae, or "terror birds".