Mammals
The mammal fauna of New Guinea is composed of all extant subclasses of mammal: the monotremes, placentals and marsupials. New Guinea contains the largest number of monotreme species of any land mass, with only one species absent: the Platypus (Ornithorhynchus anatinus). The marsupial fauna of New Guinea is diverse, consisting of the three orders: Dasyuromorphia, Peramelemorphia and Diprotodontia.
The native placental mammals are solely represented by the rodents and bats. There are approximately the same number of placental species as maruspials and monotremes.
Read more about this topic: Fauna Of New Guinea