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 Molossus molossus (Pallas, 1766) - Pallas' mastiff-bat Molossus molossus debilis Miller, 1913