Class Mammalia Linnaeus, 1758 - mammals Order Diprotodontia Owen, 1866 Family Pseudocheiridae Winge, 1893 Genus Pseudocheirus Ogilby, 1837 - ring-tailed possums Pseudocheirus mayeri (Rothschild & Dollman, 1932) - pygmy ringtail see Pseudochirulus mayeri (Rothschild & Dollman, 1932)