Class Mammalia Linnaeus, 1758 - mammals Order Chiroptera Blumenbach, 1779 - bats Family Pteropodidae Gray, 1821 - Old World fruit bats Subfamily Pteropodinae Gray, 1821 Genus Hypsignathus Allen, 1861 - hammer-headed fruit bat Hypsignathus monstrosus Allen, 1861 - hammer-headed fruit bat