Oxymycterus dasytrichus is a rodent of eastern Brazil. Its account records it in seasonally flooded forest, moist openings in or near forest, and cultivated fields.
The back ranges from dark brown to paler reddish brown. The underside ranges from dark gray to lighter cinnamon or pinkish buff.
It has been recorded in seasonally flooded forest and in moist openings within or near forest. The account also notes records from cultivated fields.
An extinction-risk assessment has not been added yet.