Janis, C. M., K. M. Scott, and L. L. Jacobs (eds.) 1998. Evolution of Tertiary Mammals of North America. Cambridge University Press, New York.
Genus and species names, and biochronologic occurrences from earlier papers were updated to conform to this reference; if a later publication up to 2004 superceded the taxonomy or biochronology used in the Janis et al. volume, the more recent taxonomy or biochronology was used. Because of the continuing uncertainty in naming oreodonts, in most cases oreodont taxonomy remained that proposed by Lander (1998 in the Janis et al. volume).
Korth, W. W. 1994a. The Tertiary Record of Rodents in North America. Plenum Press, New York.
Genus and species names of rodent taxa were initially updated to conform to this reference; if a later publication up to 2004 superceded the taxonomy used in the Korth book, the more recent taxonomy was used.
McKenna, M. C. and S. K. Bell. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York.
This reference was used as the initial taxonomic standard above the species level; when more recent literature (through 2004) provided updates, the more recent designation was used.