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 Molossus Geoffroy, 1805 - velvety free-tailed bats
             1 Molossus aztecus Saussure, 1860
             2 Molossus barnesi Thomas, 1905
             3 Molossus coibensis Allen, 1904
             4 Molossus currentium Thomas, 1901
             5 Molossus molossus (Pallas, 1766) - Pallas' mastiff-bat
             6 Molossus pretiosus Miller, 1902 - Miller's mastiff-bat
             7 Molossus rufus Geoffroy, 1805
             8 Molossus sinaloae Allen, 1906 - Allen's mastiff-bat