Class Mammalia Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Lemuridae Gray, 1821 - large lemurs Genus Hapalemur Geoffroy Saint-Hilaire, 1851 - gentle lemurs Hapalemur simus Gray, 1871 - broad-nosed gentle lemur see Prolemur simus (Gray, 1871)