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
         Subgenus Pseudocheirus (Ogilby, 1837) see Genus Pseudocheirus Ogilby, 1837
           Pseudocheirus mayeri (Rothschild & Dollman, 1932) - pygmy ringtail see Pseudochirulus mayeri (Rothschild & Dollman, 1932)