An older account describes a reddish-brown back, white belly, and a bicolored tail longer than the body. One Yucatán survey recorded a single individual in preserved tropical forest; this does not establish a species-wide habitat preference.
An older species account describes a medium-sized mouse with a reddish-brown back and sharply contrasting white belly. Its tail is bicolored and longer than the body. The dark ears project beyond the fur and have fine reddish hairs inside.
A Yucatán survey captured one individual in preserved tropical forest. It was not captured in the farmland or secondary-forest sites sampled there, but one capture cannot establish a species-wide habitat preference.
An extinction-risk assessment has not been added yet.