Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Chiroptera Blumenbach, 1779 - bats Family Pteropodidae Gray, 1821 - Old World fruit bats Genus Hypsignathus Allen, 1861 - hammer-headed fruit bat 1 Hypsignathus monstrosus Allen, 1861 - hammer-headed fruit bat