Class [Mammalia] Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Petauridae Bonaparte, 1838 - gliding, ring-tailed, and striped possums Genus Pseudocheirus Ogilby, 1837 - ring-tailed possums Pseudocheirus albertisii (Peters, 1874) - d'Albertis' ringtail see Pseudochirops albertisii (Peters, 1874)