There is only one species in this order, the Monito del Monte, or little mountain monkey. The Monito del Monte is a semi-arboreal South American marsupial that scientists believe is more closely related to Australasian marsupials than it is to marsupials in the Americas. The Monito del Monte is the size of a mouse. It has a prehensile tail; brown fur; short, round ears; and black rings around its eyes.
