Possuidae
Possuidae is a taxonomic name that has appeared in some classifications to designate a family of marsupials commonly referred to as possums and opossums. The scope and rank of Possuidae have varied across authors, and in modern mammal taxonomy the name is not recognized as a valid, monophyletic family. In several historical treatments, Possuidae encompassed a broad array of marsupials from both the American opossums and their Australasian relatives, leading to an assemblage that does not correspond to a single lineage.
As a consequence, current classifications assign the species once placed in Possuidae to other families within
If used, the historical concept of Possuidae generally referred to small- to medium-sized, nocturnal, arboreal marsupials