This small mouse is recorded only on Cozumel Island. It has an ochre back and pale underside, and is nocturnal and semi-arboreal.
It has ochre upperparts, a grayish-white underside and a relatively long tail with short hairs.
It occurs in vine-rich secondary growth and forest edges, is active at night and climbs trees. A two-note whistling call at dusk has been reported.
An extinction-risk assessment has not been added yet.