Class Mammalia Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Lemuridae Gray, 1821 - large lemurs
       Genus Hapalemur Geoffroy Saint-Hilaire, 1851 - gentle lemurs
         1 Hapalemur aureus Meier et al., 1987 - golden lemur
         2 Hapalemur griseus (Link, 1795) - grey gentle lemur
         3 Hapalemur simus Gray, 1871 - broad-nosed gentle lemur see Prolemur simus (Gray, 1871)
         3.0 Hapalemur gallieni Standing, 1905 see Prolemur simus (Gray, 1871)