Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Chiroptera Blumenbach, 1779 - bats
       Family Molossidae Gervais, 1856 - free-tailed bats and mastiff bats
         Subfamily Molossinae Gervais, 1856
           Genus Otomops Thomas, 1913 - big-eared free-tailed bats
             1 Otomops formosus Chasen, 1939 - Java mastiff-bat
             2 Otomops johnstonei Kitchener, How & Maryanto, 1992
             3 Otomops madagascariensis Dorst, 1953
             4 Otomops martiensseni (Matschie, 1897) - Martienssen's free-tailed bat
             5 Otomops papuensis Lawrence, 1948 - big-eared mastiff-bat
             6 Otomops secundus Hayman, 1952 - mantled mastiff-bat
             7 Otomops wroughtoni (Thomas, 1913) - Wroughton's free-tailed bat