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 Nyctinomops Miller, 1902 - New World free-tailed bats
             1 Nyctinomops aurispinosus (Peale, 1848)
             2 Nyctinomops femorosaccus (Merriam, 1889) - pocketed free-tailed bat
             3 Nyctinomops laticaudatus (Geoffroy, 1805)
             4 Nyctinomops macrotis (Gray, 1840) - big free-tailed bat