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 forbesi (Thomas, 1887) - moss-forest ringtail see Pseudochirulus forbesi (Thomas, 1887)