The Southeastern four-eyed opossum (Philander frenatus), is a species of opossum found in Brazil, Paraguay and Argentina. Its dorsal fur is dark gray. The fur on the sides is also gray, but lighter than the dorsal fur. The ventral fur is white or cream-colored. The hairs on the throat have gray bases, but are divided in two by a cream-colored vertical stripe going along the midline of the throat. Its fur is short. Its tail is dark brown or black for its entire length.