The Yucatán Gray Mouse Opossum is a small opossum of the Yucatán Peninsula. Its original description gives a muted grayish-brown back and pale cream belly and cheeks. Specimens have also been collected in sub-evergreen forest in Quintana Roo.
The original description says the back is a muted grayish brown finely mixed with dark brown; the belly, cheeks, and inner legs are pale cream. A dark brown ring surrounds each eye.
In Quintana Roo, Mexico, three museum specimens were collected in medium sub-evergreen forest and one in low thorny sub-evergreen forest.
An extinction-risk assessment has not been added yet.