[2] It is found in the eastern foothills of the Andes in northern Argentina and southern Bolivia.

Its ventral fur is gray-based except for the white to yellowish chest hairs.

T. cinderella has well-developed postorbital ridges in both juveniles and adults that extend laterally behind the eye sockets.

Only adults of T. sponsorius have fully developed postorbital ridges, and these do not extend laterally behind the eye sockets.

[3] While the American Society of Mammalogists maintains this as a distinct species,[4] mitochondrial DNA sequence analysis does not support the population being distinct from T.