Nuchal patch present, coloured white to pale grey, slightly tinged with very pale yellow; dorsal colour strongly streaked with yellowish grey anteriorly (same clour as nuchal patch) and more vivid pale yellow posteriorly; head about the same colour as other anterior parts of body; venter mostly pale yellowish grey.
see James L. Patton, Ulyses F. J. Pardinas, and Guillermo D'Elia (2015): Mammals of South America, Volume 2, Rodents. The University of Chicago Press, Chicago and London.