Class Mammalia Linnaeus, 1758 - mammals
   Order Chiroptera Blumenbach, 1779 - bats
     Family Molossidae Gervais, 1856 - free-tailed bats and mastiff bats
       Genus Otomops Thomas, 1913 - big-eared free-tailed bats
         1 Otomops formosus Chasen, 1939 - Java mastiff-bat
         2 Otomops martiensseni (Matschie, 1897) - Martienssen's free-tailed bat
         3 Otomops papuensis Lawrence, 1948 - big-eared mastiff-bat
         4 Otomops secundus Hayman, 1952 - mantled mastiff-bat
         5 Otomops wroughtoni (Thomas, 1913) - Wroughton's free-tailed bat