The Nayarit mouse is recorded on the coastal lowlands of Nayarit in western Mexico. Specimens come from tropical forest and moist riverine settings.
The tail is indistinctly bicolored or nearly uniform in color. The paper also notes a small skull.
Specimens were recorded in lowland tropical forest, floodplains, mangroves, and moist riparian settings. The study identifies these collecting habitats but does not detail its diet or activity time.
An extinction-risk assessment has not been added yet.