A young adult female collected in eastern Bolivia in 1990 had grizzled brownish-gray fur and reddish fur beside the face and ears. It was captured near a wet place bordered by savanna and forest and was described as a new species in 2012.
The single young adult female holotype had uniformly grizzled brownish-gray fur from crown to rump, slightly paler along the flanks. Fur on the sides of the head and around the ears was pale reddish; the belly fur was gray at the base with a strong pale-beige wash.
On the evening of 28 June 1990, researchers set Sherman traps near a wet place bordered by savanna and forest; the holotype was found in them the next morning. The paper describes the surrounding landscape as a mosaic of savanna, dry forest, and seasonally flooded grassland, but says further fieldwork would be needed to know which habitat the species normally uses.
An extinction-risk assessment has not been added yet.