Jones, W.; Rinderknecht, A.; Alvarenga, H.; Montenegro, F.; Ubilla, M. The last terror birds (Aves, Phorusrhacidae): new evidence from the late Pleistocene of Uruguay. Paläontologische Zeitschrift. 2017, 92 (2): 365–372. doi:10.1007/s12542-017-0388-y. Note: their date of 96 thousand years BP is the maximum age, obtained from the bottom of the fossil-containing stratum.
Federico J. Degrange; Claudia P. Tambussi; Matías L. Taglioretti; Alejandro Dondas; Fernando Scaglia. A new Mesembriornithinae (Aves, Phorusrhacidae) provides new insights into the phylogeny and sensory capabilities of terror birds. Journal of Vertebrate Paleontology. 2015, 35 (2): e912656. S2CID 85212917. doi:10.1080/02724634.2014.912656.
Federico J. Degrange; Claudia P. Tambussi; Matías L. Taglioretti; Alejandro Dondas; Fernando Scaglia. A new Mesembriornithinae (Aves, Phorusrhacidae) provides new insights into the phylogeny and sensory capabilities of terror birds. Journal of Vertebrate Paleontology. 2015, 35 (2): e912656. S2CID 85212917. doi:10.1080/02724634.2014.912656.