Pseudocheiridae is a family of arboreal marsupials containing 17 extant species of ringtailed possums and close relatives.

Even so, they are relatively small animals, with the largest being cat-sized, and they weigh between 200 grams and 2 kilograms.

They have grasping hands and feet with opposable first toes on their hindfeet, and, in all species save the greater glider, a prehensile tail.

Their teeth include a battery of grinding molars, and they lack lower canines.

Their dental formula is: Most are solitary animals, although a few live in small family groups, and they are generally shy and secretive, making them difficult to study.