Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Mammalia Linnaeus, 1758 - mammals
       Order Dermoptera Dobson, 1883
         Family Cynocephalidae Simpson, 1945 (1821) - flying lemurs
         Family †Mixodectidae Cope, 1883
         Family †Placentidentidae Russell, Louis & Savage, 1973 see Subfamily Placentidentinae Russell, Louis & Savage, 1973
         Family †Plagiomenidae Matthew, 1918